Questions and answers

No. The basket size is only half of it; the locking ears must match your machine's group. Profitec, for example, calls the GO 2.0's group a ring brew group rather than an E61. Buy a variant named for your model; see bottomless portafilters by machine. More in Baskets and portafilters

It makes the basket itself more consistent: VST, for example, measures every hole and holds total open area within plus or minus 5%. Whether that shows in the cup depends on your grinder and recipe; we found no controlled taste comparison. More in Baskets and portafilters

Not on their own. barista.tools, a barista-tools retailer, argues that hole count alone does not determine extraction yield or flavor and that there is no universally optimal number; hole size, spacing and open area work together. More in Baskets and portafilters

Use the basket maker's range. IMS lists 16 to 18 g of dark roast for its 24.5 mm-high 58 mm basket, rising to 24 to 26 g of light roast in the 28.5 mm version; Breville gives 18 g for the Bambino and 22 g for the Dual Boiler. More in Baskets and portafilters

Breville's guide says to use single-wall baskets with freshly ground beans and dual-wall (pressurized) baskets with pre-ground coffee. More in Baskets and portafilters

VST says it measures 100% of the holes on every filter and holds total open area within plus or minus 5%. That is the maker's own statement; we have not seen an independent audit of it. More in Precision espresso baskets explained

Both publish the tamper size their baskets are made for: 58.40 mm for VST's 15 to 25 g baskets and 58/58.4 mm for IMS's 58 mm competition baskets. Choose by the dose range and tamper you need; we found no controlled comparison of the two. More in Precision espresso baskets explained

Not by themselves. barista.tools argues that hole count alone does not determine extraction or flavor and that there is no universally optimal number; open area, hole size and spacing all play a part. That is an expert explanation, not a measurement. More in Precision espresso baskets explained

Yes. IMS makes a dedicated 54 mm line for the Barista Express, Bambino, Pro and Touch, such as the B62.52TH24E: 54 mm inside, 24 mm high, for a 53/53.4 mm tamper. More in Precision espresso baskets explained

Yes. IMS lists dose ranges that rise with basket height: its 24.5 mm B70 basket takes about 16 to 22.5 g depending on roast, and its 28.5 mm version 20 to 26 g. More in Precision espresso baskets explained

We found no evidence that it improves flavor by itself. Its main use is showing you how the shot flows, which helps you find prep problems that a spouted portafilter hides. More in Why does my bottomless portafilter spray?

Probably not. In Socratic Coffee's controlled test, tamps from 5 to 20 kg gave no difference in extraction. A level tamp with a tamper that fills the basket matters more than force. More in Why does my bottomless portafilter spray?

Common suspects are a tamper that is too small for the basket, which leaves an untamped ring, or grounds that are loose near the wall. Check your tamper against the basket maker's size, then stir the edges during WDT. More in Why does my bottomless portafilter spray?

It can make flow uneven. Cameron et al. (2020) found that extraction yield peaks and then falls at very fine grind settings because water flows unevenly through the puck. If shots spurt at a very fine setting, try slightly coarser. More in Why does my bottomless portafilter spray?

Only if it is made for your machine's locking ears, not just its diameter. See why a portafilter won't lock and bottomless portafilters by machine. More in Why does my bottomless portafilter spray?

A screen adds its own thickness above the puck. If your dose already filled the basket, there may be no room left. Lower the dose a little or choose a thinner screen; see are puck screens worth it. More in Why won't my portafilter lock in?

No. Diameter describes the basket, not the locking ears. Profitec, for example, describes the GO 2.0's group as a ring brew group rather than an E61, so a portafilter sold for E61 machines is not automatically a match. More in Why won't my portafilter lock in?

Check the basket maker's range. IMS lists its 24.5 mm B70 basket for 16 to 18 g of dark roast and up to 20 to 22.5 g of light roast, with taller versions for larger doses. More in Why won't my portafilter lock in?

Both are 54 mm, but Breville sells different spare parts: SP0027237 lists the Barista Express, Express Impress, Pro, Touch and Touch Impress, while SP0024799 lists only the Bambino Plus. Buy the part listed for your model number. More in Why won't my portafilter lock in?

No. Find the cause first. The group is hot, a slip can end with a burn, and forcing the handle only hides the real problem. More in Why won't my portafilter lock in?

No. The locking ears are a separate fit from the basket size. Profitec, for example, calls the GO 2.0's group a ring brew group rather than an E61. Order the variant named for your machine, and ask the seller if yours is not listed. More in Bottomless portafilters by machine

A retailer's listing for the 51 mm DLSC085 names La Specialista and Dedica Maestro models such as the EC9155, EC9335 and EC9665; the Dedica EC685 and EC885 are not on it. De'Longhi's own pages do not show the list. More in Bottomless portafilters by machine

Both are 54 mm, but Breville sells them under different spare part numbers: SP0027237 for the Barista Express family and SP0024799, which lists only the Bambino Plus. Ask the seller before assuming one 54 mm variant fits both. More in Bottomless portafilters by machine

Look at the top rim of the portafilter you have now. The ears are the tabs that slide into the group head as you turn the handle; count them and order the variant with the same number. More in Bottomless portafilters by machine

We found no evidence that removing the spouts changes flavor by itself. Its value is visibility: you can watch the shot form and spot uneven flow, which points you to distribution or tamping problems. More in Bottomless portafilters by machine

No. CBP says the de minimis exemption remains suspended for goods of $800 or less by all modes, including mail, and a February 2026 presidential action continued the suspension regardless of value. More in Buying and safety

Usually, if it is worth more than C$20. CBSA's relief for mail from any country, and for courier parcels from outside the US and Mexico, stops at C$20; above that, a mailed item owes any duty plus GST/HST and any PST on its full value. More in Buying and safety

Not on its own. The FDA says a food-contact item's regulatory status depends on each substance that could migrate into food under its intended use, so an alloy number or a label is a seller's claim, not proof. More in Buying and safety

No. Free Return applies only to listings that show the Free Return label, for buyers AliExpress deems eligible, with a 15-day window after receipt and a limit of three uses a month. Items must come back unused, in their original packaging. More in Buying and safety

No. OSHA says its recognition of a testing laboratory is not an endorsement of the equipment that lab certifies. An FCC ID relates to the rules for radio devices, not to food safety or accuracy. More in Buying and safety

Only on listings with the Free Return label, for buyers AliExpress deems eligible. You can request a return within 15 calendar days of confirming receipt, and the item must be unused, with its original packaging. More in Buying espresso accessories on AliExpress: what to check

No. Duty-free de minimis treatment ended for all countries on August 29, 2025, and it remains suspended for goods of $800 or less arriving by any mode, including mail. More in Buying espresso accessories on AliExpress: what to check

Often, yes. Parcels from countries such as China are duty- and tax-free only up to C$20; above that, duty and GST/HST, plus any PST, apply to the full value. More in Buying espresso accessories on AliExpress: what to check

AliExpress's Free Return terms allow the free return shipping service at most three times per month, and they exclude very large orders. More in Buying espresso accessories on AliExpress: what to check

No. Breville makes both 54 mm and 58 mm machines, so match your exact model or tool size. See the basket and tamper size guide. More in Buying espresso accessories on AliExpress: what to check

It is the seller's description, not proof of compliance. The FDA says a food-contact article's regulatory status depends on each substance that may migrate into food under its intended use. More in Are AliExpress espresso accessories safe?

No. FCC equipment authorization concerns radio transmitters; we read it as applying to Bluetooth scales. An FCC ID is not a food-safety or quality mark. More in Are AliExpress espresso accessories safe?

No. OSHA recognizes private testing laboratories such as UL, and says that recognition is not an endorsement of the equipment they certify. More in Are AliExpress espresso accessories safe?

If the listing carries the Free Return label and AliExpress deems you eligible, you can request a return within 15 calendar days of confirming receipt; items must be unused, with original packaging. Without the label those terms do not apply, so check the listing's own return terms before you order. More in Are AliExpress espresso accessories safe?

Yes. Wash anything that touches coffee before first use, and check for burrs, loose parts or flaking coating. Follow the maker's care instructions: De'Longhi, for example, says its DLSC080 tamper is not dishwasher safe. More in Are AliExpress espresso accessories safe?

A scale. It lets you repeat a recipe by weight, and in Socratic Coffee's tamping test brew weight, not tamp force, drove the differences in strength (TDS). More in Beginner espresso accessory checklist

Only if it does not fill your basket well or is hard to use level. Some machines ship with a plastic tamper, such as Gaggia's Classic E24 and Lelit's Anna. More in Beginner espresso accessory checklist

Its portafilter is 54 mm, but precision-fit tampers for Breville's 54 mm baskets are about 53.3 mm: Normcore lists 53.3 mm for the Bambino and Bambino Plus. More in Beginner espresso accessory checklist

If you use pre-ground coffee, yes. Breville's Barista Express guide says to use dual-wall baskets with pre-ground coffee and single-wall baskets with freshly ground beans. More in Beginner espresso accessory checklist

No. It is a diagnostic tool that shows how the shot flows, and it can wait until your routine is steady. See why a bottomless portafilter sprays. More in Beginner espresso accessory checklist

No. In Socratic Coffee's 2016 test, OCD-style spinning distributors lowered TDS and extraction compared with using no distributor. Keep one only if you like it and your shots taste right. More in Espresso accessories you don't need

Not if you value consistency, but the force number itself is not special: tamps from 5 to 20 kg gave no TDS difference in Socratic Coffee's test. A level tamp with a well-fitting tamper is what matters. More in Espresso accessories you don't need

A scale. Weighing dose and output lets you repeat a recipe, and in Socratic Coffee's tamping experiment brew weight, not tamp force, drove the differences in TDS. More in Espresso accessories you don't need

Not entirely: a screen keeps the shower screen cleaner, which follows from how it works. Claims that it fixes channeling or improves taste have no controlled evidence that we found; see are puck screens worth it. More in Espresso accessories you don't need

Only if static bothers you. Socratic Coffee found no significant extraction difference with RDT. You can try the technique with a small mister you already own before buying a dedicated one. More in Espresso accessories you don't need

Follow your manual. Profitec and ECM both suggest a backflush with cleaner after about 90 to 140 cups and warn that doing it too often strips grease from moving parts. Breville's Barista Express prompts you with a CLEAN ME light. More in Cleaning and maintenance

No. Urnex says Cafiza removes coffee residue and oils from group heads, valves and lines, and its page does not mention scale. Breville also treats backflushing as separate from descaling. See Cafiza vs descaler. More in Cleaning and maintenance

Urnex says up to half a teaspoon (3 g), then five cycles of 10 seconds on and 10 seconds off, a rinse, five more cycles without powder, and one espresso pulled and thrown away. More in Cleaning and maintenance

Urnex's soak for parts is 6 g of Cafiza per liter of hot water for 30 minutes, then a rinse, and it says not to submerge the portafilter's handle. More in Cleaning and maintenance

Do not assume so. Backflush only if your manual describes it, with the blind basket or cleaning disc it specifies; Breville, Profitec and ECM each publish their own procedure. More in Cleaning and maintenance

No. Urnex describes Cafiza as removing coffee residue and oils, and its page does not present it as a descaler. Use the descaler your machine's manual names. More in Cafiza vs descaler: which does what?

Only if your manual says so. Breville, for example, describes its back-flushing cleaning cycle as separate from descaling, and the two use different products. More in Cafiza vs descaler: which does what?

No. Breville's Barista Express guide uses one cleaning tablet with the cleaning disc for its back-flushing cleaning cycle, which it says is separate from descaling. More in Cafiza vs descaler: which does what?

Urnex says Cafiza is NSF and Kosher (pareve) certified. Rinse thoroughly, and after a backflush pull and discard one espresso, as Urnex directs. More in Cafiza vs descaler: which does what?

Use the descaler and procedure in your machine's manual. We have no verified source on vinegar for espresso machines, so we do not recommend improvising with it. More in Cafiza vs descaler: which does what?

No. Only backflush if your manual describes it. Breville, Profitec and ECM document it for the machines we checked; a blind basket in the box is a good sign, but the manual is the authority. More in How to backflush an espresso machine

Follow your manual. Profitec's PRO 400 & JUMP manual and ECM's Classika PID manual both say about every 90 to 140 cups, and both warn that cleaning with detergent too often degreases moving parts. More in How to backflush an espresso machine

Urnex says up to 1/2 teaspoon (3 g) in a blind filter for a backflush, and 6 g per liter of hot water when soaking parts. More in How to backflush an espresso machine

No. Backflushing clears coffee residue and oils from the group; descaling removes mineral scale from inside the machine. Breville's Barista Express guide says its back-flushing cleaning cycle is separate from descaling; see Cafiza vs descaler. More in How to backflush an espresso machine

Urnex's Cafiza instructions end with pulling an espresso to remove traces of cleaner and discarding it, so yes, after a detergent backflush. More in How to backflush an espresso machine

We found no controlled extraction study of needle WDT. Its case is mechanical: needles break up clumps through the whole bed before you tamp. The one controlled study of spinning distributors we found showed that they lowered extraction compared with using no distributor. More in Distribution and WDT

No. A distributor only levels the surface, which a level tamp already does. If you use both, judge the result by taste and your scale rather than by how flat the puck looks. More in Distribution and WDT

No source we checked establishes a best size. Normcore uses 0.25 mm needles in its WDT V2.1 and sells replacements in 0.25 and 0.3 mm. More in Distribution and WDT

A handheld needle tool does not; it works in 51, 54 and 58 mm baskets alike. Rotary WDT tools and distributors that sit on the portafilter are sold by size, so order the variant for your machine. More in Distribution and WDT

No. RDT means adding a little water to the beans before grinding, to cut static; WDT means stirring the grounds in the basket. See grinder accessories for what the RDT evidence shows. More in Distribution and WDT

For clumps, yes: needles reach through the whole bed, while a distributor only levels the top. In Socratic Coffee's test, OCD-style spinning distributors lowered extraction compared with using no distributor. More in Needle WDT tool vs three-slope distributor

Yes: needles first, then the distributor. Judge the combination by the shot, because the published distributor results were worse than using nothing. More in Needle WDT tool vs three-slope distributor

Yes. It sits inside the basket, so buy the size for your basket family; the listing we track sells 51, 53 and 58 mm versions (the seller's sizing). A needle tool fits any basket. More in Needle WDT tool vs three-slope distributor

No. Socratic Coffee tested the OCD and OCD 2. We treat the result as evidence about surface-only spinning tools in general, not proof about every design. More in Needle WDT tool vs three-slope distributor

It targets clumps and uneven density, which make water flow unevenly through the puck. We found no controlled extraction study of WDT that we could verify, so the benefit rests on that mechanism and on barista practice. A spinning surface distributor, by contrast, lowered extraction in a published Socratic Coffee test. More in What is WDT?

No source we found establishes a best size. Normcore's V2.1 tool uses 0.25 mm needles and Normcore sells replacements in 0.25 and 0.3 mm, which shows the range makers work in. Fine, straight needles that reach the bottom of your basket matter more than a tenth of a millimeter. More in What is WDT?

No. In Socratic Coffee's test, OCD-style spinning distributors lowered TDS and extraction compared with using no distributor. If you like a flat surface before tamping, judge the combination by the shot; our needle tool vs distributor comparison covers both. More in What is WDT?

All the way to the bottom of the basket. Clumps sit throughout the bed, so stirring only the top leaves the lower ones where they are. More in What is WDT?

It helps a lot. Stirring flicks grounds over the rim, and a funnel sized to your portafilter keeps them in the basket. See how to choose a dosing funnel. More in What is WDT?

Start with a needle tool: it works in any basket and has nothing to size. A rotary tool repeats the same stirring pattern each time, and the IKAPE adds a funnel, but it is sold per portafilter size. We found no controlled study comparing the two. More in Best WDT tools for espresso

No source we checked establishes a best size. Normcore uses 0.25 mm needles in its WDT V2.1 and sells replacements in 0.25 and 0.3 mm. Neither of our picks states its needle thickness. More in Best WDT tools for espresso

No. In Socratic Coffee's 2016 comparison, two spinning distributors lowered extraction compared with using none. If you like a flat surface, a level tamp gives you one. More in Best WDT tools for espresso

A handheld needle tool fits any basket. A rotary tool that sits on the portafilter has to match its size: the IKAPE V3 is sold in 51, 54 and 58 mm (the seller's sizing). More in Best WDT tools for espresso

A 54 mm funnel. Breville lists its own 54 mm funnel for the Barista Express, Express Impress, Pro, Touch and Touch Impress, and Normcore lists a 54 mm funnel for the Bambino models as well. More in Dosing funnels and cups

A funnel sits on the portafilter rim, while a tamper has to fit inside the basket. Normcore's compatibility guide pairs exactly these two sizes for Breville's 54 mm machines. More in Dosing funnels and cups

Only if the rim is a metal the magnets can grip. Profitec's magnetic 58 mm funnel lists no compatible machines, so hold a fridge magnet to your portafilter rim before you rely on one. More in Dosing funnels and cups

Not for grinding, since the cup catches the grounds. A funnel still helps if you stir the grounds with a WDT tool once they are in the basket. More in Dosing funnels and cups

Less than you might expect, in one study: at the same beverage volume, a 12 g dose gave bioactive compounds about 9% lower than a 14 g dose. The study measured chemistry, not taste, so let your palate decide. More in Dosing funnels and cups

54 mm. Breville's own BEA201 dosing funnel is listed for the Barista Express, Express Impress, Barista Pro, Barista Touch and Touch Impress. More in How to choose a dosing funnel

Normcore lists a 54 mm funnel for the Bambino and Bambino Plus. Breville's own BEA201 funnel list does not include the Bambino models, so check that a listing names yours. More in How to choose a dosing funnel

Only if the portafilter's top edge is a metal that holds a magnet. Try a fridge magnet on the rim of your portafilter before you buy a magnetic funnel. More in How to choose a dosing funnel

Yes. Sellers use both names for a collar that sits on top of the portafilter. A dosing cup is different: you grind into it, then pour the grounds into the basket. More in How to choose a dosing funnel

It helps. Stirring flicks grounds over the rim, and a funnel extends the wall so they stay in the basket. See what is WDT. More in How to choose a dosing funnel

Normcore lists a 54 mm funnel for the Bambino and Bambino Plus. Breville's own 54 mm funnel lists only the Barista Express, Express Impress, Pro, Touch and Touch Impress, so check that the funnel seats on your portafilter's rim. More in Best dosing funnels for 51, 54 and 58 mm portafilters

A funnel sits on the portafilter rim, while a tamper has to fit inside the basket. Normcore pairs a 54 mm funnel with a 53.3 mm tamper for Breville's 54 mm machines. More in Best dosing funnels for 51, 54 and 58 mm portafilters

Only on a rim the magnets can grip. Profitec's magnetic 58 mm funnel, like ECM's 58 mm funnel, lists no compatible machines, so test your rim with a fridge magnet first. More in Best dosing funnels for 51, 54 and 58 mm portafilters

Yes; that is one of the main reasons to buy one. The funnel keeps the grounds in the basket while the needles stir. Our WDT tool shortlist has two options. More in Best dosing funnels for 51, 54 and 58 mm portafilters

Not in Socratic Coffee's 2024 trial, which found no significant TDS difference and somewhat less consistent shot times. Socratic notes a 2023 paper that reported a possible gain in a very small sample (n = 3), so the evidence is mixed. More in Grinder accessories

It is meant to cut static, so fewer grounds cling to the grinder and the chute. That is a workflow fix, not a flavor upgrade, and you can see for yourself whether it works on your grinder. Check the grinder's manual before adding moisture. More in Grinder accessories

No. Cameron and colleagues found that extraction yield peaks and then falls at very fine settings, because water flows unevenly through the puck, which also makes shots less repeatable. More in Grinder accessories

Only if one is made for your grinder model and retained grounds or swapping beans actually bother you. We found no controlled study measuring their effect on retention, extraction or taste. More in Grinder accessories

Not in Socratic Coffee's 2024 test, which found no significant difference in TDS with RDT. Socratic notes that a 2023 paper reported a possible gain in brew efficiency, but in a very small sample (n = 3). More in Does RDT work?

To cut static, so grounds cling less to the grinder and scatter less on the counter. That is its stated purpose; we found no controlled measurement of the static effect that we could verify. More in Does RDT work?

Very little: a single light mist, or a spoon handle dipped in water and stirred through the beans. No source we verified gives an optimal amount, so start small. More in Does RDT work?

We have no verified evidence either way. Check your grinder's manual, keep water off the grinder itself, and do not use RDT if the manual warns against moisture. More in Does RDT work?

Possibly. Socratic Coffee saw more shot-time variability with RDT; the pre-grind spritz was the most variable condition, a result just short of statistical significance (p = 0.0523). More in Does RDT work?

Normcore lists a 53.3 mm screen for the Bambino, Bambino Plus and the Barista Express, Pro and Touch. A 53.5 mm screen is slightly larger, so check that it drops in freely before you rely on it. More in Puck screens

We found no controlled study showing that. Channeling starts with uneven grounds and an uneven tamp, below the screen, which a screen on top does not change. Sort out distribution first. More in Puck screens

Possibly. The screen takes up headspace. If the portafilter becomes harder to lock in, or the screen comes out with a deep imprint of the shower screen, lower the dose slightly or use a thinner screen. More in Puck screens

Not automatically. Normcore lists 58.5 mm for many 58 mm machines, but VST and IMS size their baskets for tampers of up to 58.4 mm, and Flair's standard basket narrows to 58.5 mm. Check that the screen drops in and lifts out freely. More in Puck screens

No. A metal puck screen sits on top of the puck and is reused; a paper filter is a disposable disc placed above or below the coffee. We found no controlled study comparing the two. More in Puck screens

We found no controlled evidence that it does. Channeling starts with uneven grounds and tamping below the screen, so fix distribution first; see what is WDT. More in Are puck screens worth it?

About 53.3 mm for the 54 mm machines: Normcore lists a 53.3 mm screen for the Barista Express, Pro, Touch and Bambino models. More in Are puck screens worth it?

Normcore lists 58.5 mm for most 58 mm machines, including the Gaggia Classic, Rancilio Silvia and Breville Dual Boiler. Check that it drops in and lifts out freely in your basket. More in Are puck screens worth it?

Only if you run out of headspace. Lock the portafilter in without brewing and look for a deep shower-screen imprint on the screen; if you see one, reduce the dose slightly. More in Are puck screens worth it?

A thinner screen takes up less headspace. MHW-3BOMBER sells its screen in 0.2 and 0.8 mm versions (the seller's figures). We found no evidence that thickness changes taste. More in Are puck screens worth it?

About 53.3 mm, the size Normcore lists for Breville's 54 mm machines. MHW-3BOMBER's 53.35 mm screen is the closer of our two picks; ALIKISSCAFE's 53.5 mm screen is slightly larger, so check that it drops in freely. More in Best puck screens for 51, 54 and 58 mm baskets

The 0.2 mm screen takes 0.6 mm less headspace (the seller's figures). Choose it if your dose already sits close to the shower screen; we found no evidence that either thickness extracts better. More in Best puck screens for 51, 54 and 58 mm baskets

Normcore lists 58.5 mm screens for many 58 mm machines, but baskets vary: VST and IMS size theirs for tampers of up to 58.4 mm. Check that the screen drops in and lifts out freely. More in Best puck screens for 51, 54 and 58 mm baskets

We found no controlled study showing that. Their clear benefit is keeping coffee off the shower screen. See are puck screens worth it? for the details. More in Best puck screens for 51, 54 and 58 mm baskets

It is the smallest step the display shows. It does not tell you how accurate the scale is: Acaia's manual lists readability, repeatability and linearity as separate specifications. More in Scales and weighing

If you want repeatable shots, yes. In Socratic Coffee's tamping study, the weight of the brew drove the differences in strength (TDS), so weighing the shot controls a variable that matters. More in Scales and weighing

Yes, if it reads in 0.1 g steps and fits on your drip tray. A scale that reads only whole grams hides changes smaller than 1 g, which is over 5% of the 18 g dose Breville gives for the Bambino. More in Scales and weighing

Only if its maker gives a rating. Acaia's Lunar manual gives none, lists error codes for water in the buttons and says to clean the scale with a soft cloth and warm water only. Wipe spills promptly. More in Scales and weighing

No. US rules require devices that intentionally emit radio signals to be certified before they are marketed; an FCC ID relates to that, not to food safety or accuracy. See buying and safety. More in Scales and weighing

No. Makers' example doses run from about 16 to 22 g, so a 0.1 g step is around half a percent of the dose. A scale that repeats its readings matters more than a finer display. More in Espresso scale accuracy vs resolution

How closely the scale gives the same reading for the same load, time after time. Acaia's Lunar manual, for example, lists 0.1 g repeatability alongside 0.1 g readability. More in Espresso scale accuracy vs resolution

Only if its maker gives a water-resistance (IP) rating. Acaia's Lunar manual gives none and lists error codes for water in its buttons, so do not assume a coffee scale is waterproof. More in Espresso scale accuracy vs resolution

No. US rules require radio transmitters to be certified before they are marketed, which we read as covering Bluetooth scales. An FCC ID is not a food-safety or quality mark. More in Espresso scale accuracy vs resolution

Because output weight changes strength. In Socratic Coffee's tamping experiment, brew weight, not tamp force, drove the differences in TDS. More in Espresso scale accuracy vs resolution

Yes for home use. At the 18 g dose Breville gives for the Bambino, one 0.1 g step is about half a percent. Remember that resolution is not accuracy: Acaia lists readability, repeatability and linearity separately. More in Best espresso scales with a timer and 0.1 g readout

Because the amount of espresso in the cup changes its strength. In Socratic Coffee's tamping study, brew weight, not tamp force, drove the differences in TDS. Time is still worth noting alongside weight, which is why both picks have a timer. More in Best espresso scales with a timer and 0.1 g readout

We found no water-resistance rating for either, so wipe spills promptly. Even Acaia's Lunar manual gives no rating and says to clean the scale with a soft cloth and warm water only. More in Best espresso scales with a timer and 0.1 g readout

Measure two things first: the drip tray's width and depth, and the gap from the tray to the bottom of the portafilter with a cup in place. Then compare them with the dimensions on the listing. More in Best espresso scales with a timer and 0.1 g readout

1:2 is a common starting point: Socratic Coffee used 20 g in and 40 g out in its tamping study, and Cafelat gives 16 g in and 32 g out as an example for its Robot. Adjust from there by taste. More in Espresso ratio calculator

Weigh it, and note the time as well. In Socratic Coffee's tamping study, brew weight, not tamp force, drove the differences in strength (TDS). More in Espresso ratio calculator

Start with your basket's stated dose. Breville gives 18 g for the Bambino and Barista Express and 22 g for the Dual Boiler, and basket makers such as IMS publish a dose range for each basket. More in Espresso ratio calculator

A ristretto is a shorter, more concentrated shot and a lungo a longer one, but the names are used loosely. Go by the numbers instead: set your dose and the yield you want, and the calculator shows the ratio. More in Espresso ratio calculator

About 53.3 mm, even though Breville calls the portafilter 54 mm. Normcore lists a 53.3 mm tamper for the Barista Express, Pro, Touch, Bambino and Bambino Plus, and IMS gives 53 to 53.4 mm for its Breville basket. See Breville 54 mm machines. More in Tampers and tamping

Go by your basket. VST specifies 58.40 mm for its baskets, IMS 58 to 58.4 mm, and Flair calls 58.5 mm the largest size for the Flair 58. Normcore lists 58.5 mm for many 58 mm machines, but Decent Espresso advises against it because a very close fit can lift the puck. More in Tampers and tamping

Firmly and level, until the coffee stops compressing. Socratic Coffee found no significant TDS difference between tamps of 5, 10, 15 and 20 kg, so a press you can repeat matters more than a target number. More in how hard to tamp. More in Tampers and tamping

Only if you want one variable fixed. A spring tamper makes every tamp end at the same force; there is no evidence that the force itself improves extraction. The number is a convention: Normcore offers 15, 25 and 30 lb springs for the same tamper. More in Tampers and tamping

De'Longhi says its 51 mm DLSC080 tamper fits all its manual espresso machine portafilters. If you have swapped in an aftermarket basket, use that basket maker's tamper size instead. More in Tampers and tamping

Not automatically. A closer fit leaves a thinner untamped edge, but VST, IMS, Flair and Profitec's PRO 400 manual all specify 58.4 mm, and Decent advises against 58.5 mm because a very close fit can lift the puck. More in 58 mm, 58.4 mm or 58.5 mm tamper?

Yes. It is smaller than the 58.4 mm that basket makers specify, so it fits, and Rocket and Gaggia sell 58 mm tampers for their own machines. The trade-off is a slightly wider ring of untamped coffee at the edge. More in 58 mm, 58.4 mm or 58.5 mm tamper?

Its portafilter is 58 mm, and IMS serves it with B70 baskets that list a 58/58.4 mm tamper. Normcore lists 58.5 mm for it. Go by the basket you actually use. More in 58 mm, 58.4 mm or 58.5 mm tamper?

Its PRO 400 & JUMP manual recommends a 58.4 mm tamper, but its 58.5 mm walnut tamper is marketed for the JUMP among other machines. We report both; for those two machines the manual is the more specific document. More in 58 mm, 58.4 mm or 58.5 mm tamper?

Mostly. A screen sits on the tamped puck and must drop in and lift out without binding. Normcore lists 58.5 mm screens for most 58 mm machines, so check that yours lies flat in your basket. More in 58 mm, 58.4 mm or 58.5 mm tamper?

Worth it for consistency, not for the number. In Socratic Coffee's controlled test, tamps from 5 to 20 kg gave no difference in extraction (TDS), so the benefit is that each tamp matches the last. More in Calibrated, spring-loaded or impact tamper?

There is no proven best. Normcore ships its V4 with 15, 25 and 30 lb springs, Decent says coffee is fully compressed at about 15 lb, and Breville tells Barista Express owners to tamp with 15 kg. Pick one and keep it. More in Calibrated, spring-loaded or impact tamper?

A tamper with a spring mechanism that adds a quick final press at the end of the stroke. MHW-3BOMBER and IKAPE both sell them. We found no independent measurement comparing an impact press with a steady one. More in Calibrated, spring-loaded or impact tamper?

Only if its base suits your basket's inside diameter and its collar sits on your portafilter's rim with the base still reaching the coffee. Check the base size against your basket maker's figure in the basket and tamper size guide. More in Calibrated, spring-loaded or impact tamper?

That figure is the seller's. We have not seen an independent check of any AliExpress tamper's spring force, and the number matters less than tamping the same way every time. More in Calibrated, spring-loaded or impact tamper?

Until the coffee stops compressing. In Socratic Coffee's test, tamps of 5, 10, 15 and 20 kg gave no difference in TDS (p = 0.40), so a level, complete tamp matters more than any number. More in How hard should you tamp espresso?

It is a common figure, not a proven one. Decent says coffee is fully compressed at about 15 lb, Breville tells Barista Express owners to tamp with 15 kg, and Profitec's PRO 400 manual says about 20 kg. More in How hard should you tamp espresso?

Change the grind instead. Tamp force from 5 to 20 kg made no TDS difference in Socratic Coffee's test, while grind size changes how water moves through the puck. More in How hard should you tamp espresso?

It can. A tilted tamp leaves one side of the puck thinner, and water takes the easier path. A self-leveling tamper helps if you struggle to tamp straight; see tamper types compared. More in How hard should you tamp espresso?

One that fills your basket: about 53.3 mm for Breville's 54 mm baskets and 58.4 mm for VST's 58 mm-class baskets. See the basket and tamper size guide. More in How hard should you tamp espresso?

About 53.3 mm for the Bambino, Barista Express, Pro and Touch: Normcore designs its 53.3 mm tamper for 54 mm baskets, and IMS lists 53/53.4 mm for its Breville basket. Tool fit for the Impress models is not confirmed. More in Espresso basket and tamper size guide

It fits, but many 58 mm baskets are made for a slightly larger tamper: VST specifies 58.40 mm and IMS 58/58.4 mm. Normcore lists 58.5 mm, while Decent advises against 58.5 mm. Go by your basket; see 58 vs 58.5 mm tampers. More in Espresso basket and tamper size guide

51 mm. De'Longhi says its 51 mm DLSC080 tamper fits all De'Longhi manual espresso machine portafilters. More in Espresso basket and tamper size guide

Lelit says the Anna uses its LELIT57 group and LELIT57 tools but publishes no diameter. Normcore lists a 57.5 mm tamper for it. Do not buy generic 58 mm tools for a LELIT57 machine. More in Espresso basket and tamper size guide

With digital calipers, across the inside of the clean basket at the depth where the coffee bed sits, not across the rolled rim. Baskets taper: Flair's standard basket is 58.7 mm at the top and 58.5 mm lower down. More in Espresso basket and tamper size guide

Not a standard 58 mm-class tamper. Cafelat's Robot Professional basket is 57.8 mm inside and 60 mm deep, and Cafelat's own leveling tamper for it is about 57.4 mm. More in Espresso basket and tamper size guide

The IKAPE 53.30 mm base or the ALIKISSCAFE 53 mm base. Normcore lists 53.3 mm tools for Breville's 54 mm machines, and IMS gives 53 to 53.4 mm for its Breville basket, so both sit in range; the IKAPE is the closer fit. More in Best espresso tampers for 51, 54 and 58 mm baskets

No evidence says so. Socratic Coffee found no significant TDS difference between 5 and 20 kg tamps, and Normcore sells 15, 25 and 30 lb springs for the same tamper. The point of a spring is repeatability, not the number. More in Best espresso tampers for 51, 54 and 58 mm baskets

Go by your basket. Gaggia and Rocket supply 58 mm tampers, IMS lists 58 or 58.4 mm for its baskets and VST specifies 58.40 mm. Normcore lists 58.5 mm for many 58 mm machines, but Decent Espresso advises against 58.5 mm because a very close fit can lift the puck. More in Best espresso tampers for 51, 54 and 58 mm baskets

Flat, unless you have a reason to prefer the threaded one. VST, for example, gives its 58.40 mm tamper size for a flat base, and we found no evidence that a threaded base extracts better. More in Best espresso tampers for 51, 54 and 58 mm baskets

No. Lelit specifies LELIT57 tools for the Anna, and Cafelat's own tamper for the Robot is about 57.4 mm. Neither listing sells those sizes. More in Best espresso tampers for 51, 54 and 58 mm baskets

Because the tamper has to fit inside the basket. Normcore designs its 53.3 mm tamper for Breville's 54 mm baskets, and IMS gives 53 to 53.4 mm for its Breville basket. More in Espresso machine size finder

No maker page we could open states that figure, so we do not show one. Measure your basket instead, using the basket size guide. More in Espresso machine size finder

Start from its family: Breville 54 mm, Breville 58 mm, De'Longhi 51 mm or commercial-size 58 mm. Then check for a brand stamp on the basket, or measure the inside of the basket where the coffee sits. More in Espresso machine size finder

They are sizing for different baskets and products. Profitec's manual recommends 58.4 mm for the PRO 400, while Normcore, sizing its own tampers, lists 58.5 mm for the same machine; VST specifies 58.40 mm for its baskets. Prefer your basket maker's figure. More in Espresso machine size finder

A tamper has to slide into the basket, so it is made a little smaller than the basket's inside diameter. IMS's Breville baskets measure 54 mm inside and list a 53 or 53.4 mm tamper, and Normcore designs its 53.3 mm tamper for 54 mm baskets. More in Breville 54 mm machines

Tool sizes match: Breville gives both a 54 mm portafilter, and Normcore lists the same 53.3 mm tamper and screen and 54 mm funnel for both. Spare portafilters differ, though: Breville lists SP0024799 for the Bambino Plus and SP0027237 for the Barista models. More in Breville 54 mm machines

No. Those two use a 58 mm portafilter, so they need 58 mm tools; see Breville 58 mm machines. More in Breville 54 mm machines

It depends on the basket. Normcore lists 58.5 mm for the Dual Boiler and Oracle, while IMS, which makes B70 baskets for the Dual Boiler, Oracle and Oracle Touch, lists a 58 or 58.4 mm tamper for them. More in Breville 58 mm machines

IMS says its own do: it fits B70 baskets and CI200 shower screens to the Oracle, Oracle Touch and Dual Boiler. For other brands, check that the listing names your model. More in Breville 58 mm machines

51 mm for De'Longhi's manual espresso machines: De'Longhi says its 51 mm DLSC080 tamper fits all of their portafilters, without listing models. More in De'Longhi 51 mm machines

No. A retailer lists De'Longhi's 51 mm DLSC085 only for La Specialista and Dedica Maestro model codes, and the Dedica EC685 and EC885 are not on that list. Buy one whose listing names your model code; bottomless portafilters by machine lists the variants. More in De'Longhi 51 mm machines

No maker source we checked gives one, and Normcore's sizing guide has no De'Longhi rows. Sellers offer 51 mm screens, but that is their sizing; measure your basket's inside diameter first, as the size guide explains. More in De'Longhi 51 mm machines

It depends on the basket. Normcore sells 58.5 mm for most 58 mm machines, but VST specifies 58.40 mm for its baskets, IMS lists 58 or 58.4 mm, and Decent advises against 58.5 mm. The 58 vs 58.5 mm tamper guide goes through each source. More in Commercial-size 58 mm machines

No. The group and the portafilter's locking ears decide fit, not the basket diameter. Profitec calls the GO's group a ring brew group rather than an E61, and sellers offer separate versions for E61 and Gaggia machines. More in Commercial-size 58 mm machines

They are 58 mm-class but have their own sizes. The Flair 58's basket tapers from 58.7 to 58.5 mm and Flair prefers a 58.4 mm tamper, while the Cafelat Robot's nominal 58 mm basket measures 57.8 mm inside. See the Flair 58 and Cafelat Robot pages. More in Commercial-size 58 mm machines

About 53.3 mm. The Bambino has a 54 mm portafilter, but tools for its basket are made slightly smaller: Normcore lists 53.3 mm, and IMS's 54 mm Breville baskets call for 53 or 53.4 mm. More in Breville Bambino

Normcore lists the same sizes for both (53.3 mm tamper and screen, 54 mm funnel), and both have a 54 mm portafilter. One exception: Breville's own 54 mm dosing funnel lists the Barista models but not the Bambino. More in Breville Bambino

Breville's product pages give both a 54 mm portafilter and an 18 g dose. Breville's spare portafilter SP0024799 is listed only for the Bambino Plus, though, so check the part before buying a replacement. More in Breville Bambino

About 53.3 mm. Its portafilter is 54 mm, but Normcore lists a 53.3 mm tamper for the Bambino Plus, and IMS's Breville baskets call for 53 or 53.4 mm. More in Breville Bambino Plus

Breville's 54 mm portafilter assembly SP0024799, which lists the Bambino Plus BES500 and the Baratza Encore ESP x Bambino Plus bundle (BEP501). The Barista Express family uses a different part, SP0027237. More in Breville Bambino Plus

Breville does not say so: its 54 mm dosing funnel (BEA201) lists only the Barista Express, Express Impress, Pro, Touch and Touch Impress. Normcore lists a 54 mm funnel for the Bambino Plus. More in Breville Bambino Plus

About 53.3 mm for an aftermarket tamper. Breville calls the built-in tamper 54 mm, the nominal size; Normcore lists 53.3 mm for the Barista Express, and IMS's Breville baskets call for 53 or 53.4 mm. More in Breville Barista Express

Breville's guide says to tamp using 15 kilos of pressure. In a controlled test, Socratic Coffee found no TDS difference between 5, 10, 15 and 20 kg tamps; see how hard to tamp. More in Breville Barista Express

The portafilter and Breville's funnel do: Breville lists spare part SP0027237 and its BEA201 dosing funnel for both. Not every 53.3 mm accessory does, though: Normcore says its 53.3 mm dosing cup is not compatible with the Express Impress. More in Breville Barista Express

Breville's cleaning cycle. When the CLEAN ME light shows, the guide says to back-flush using the 1 CUP basket, the supplied cleaning disc and one cleaning tablet; it takes about 5 minutes and is separate from descaling. More in Breville Barista Express

No. Normcore says that size is not compatible with the Barista Express Impress or similar models. More in Breville Barista Express Impress

54 mm. Breville's spare 54 mm portafilter (SP0027237) lists the Express Impress along with the Barista Express, Pro, Touch and Touch Impress. More in Breville Barista Express Impress

Breville's own 54 mm dosing funnel (BEA201) lists the BES876. For other funnels, choose a 54 mm size and check that the listing names the Impress. More in Breville Barista Express Impress

About 53.3 mm. Its portafilter is 54 mm, but Normcore lists a 53.3 mm tamper for the Barista Pro and IMS's Breville baskets call for 53 or 53.4 mm. More in Breville Barista Pro

The sizes match. Breville lists its spare 54 mm portafilter and its 54 mm dosing funnel for both, and Normcore gives both the same tamper, screen and funnel sizes. More in Breville Barista Pro

About 53.3 mm. Its portafilter is 54 mm, but Normcore lists a 53.3 mm tamper for the Barista Touch and IMS's Breville baskets call for 53 or 53.4 mm. More in Breville Barista Touch

The sizes match. Breville lists its spare 54 mm portafilter and its 54 mm dosing funnel for both, and Normcore gives both the same tamper, screen and funnel sizes. More in Breville Barista Touch

54 mm. Breville's spare 54 mm portafilter (SP0027237) lists the Touch Impress (BES881) with the Barista Express, Express Impress, Pro and Touch. More in Breville Barista Touch Impress

Yes. Breville lists the BES881 for its 54 mm dosing funnel (BEA201). More in Breville Barista Touch Impress

It depends on the basket. Normcore lists 58.5 mm for the Dual Boiler, while IMS, which makes B70 baskets for it, lists a 58 or 58.4 mm tamper for those baskets. More in Breville Dual Boiler

No. The Dual Boiler has a 58 mm portafilter, while the Bambino and Barista Express use Breville's 54 mm size. More in Breville Dual Boiler

Breville's 58 mm portafilter assembly SP0001817, which lists the Dual Boiler BES920 along with the Oracle Jet, Oracle Dual Boiler and Dynamic Duo. More in Breville Dual Boiler

58 mm, holding a 22 g dose, according to Breville's product page. IMS also lists the Oracle Touch among Breville's 58 mm group heads. More in Breville Oracle Touch

With IMS's B70 baskets, which IMS recommends for the Oracle Touch, a 58 or 58.4 mm tamper. Normcore lists 58.5 mm for the 'Oracle' but does not name the Touch. More in Breville Oracle Touch

Breville does not list it: the compatibility list for SP0001817 names the Oracle Jet, Oracle Dual Boiler, Dual Boiler and Dynamic Duo, not the Oracle Touch BES990. More in Breville Oracle Touch

51 mm. De'Longhi says its 51 mm DLSC080 tamper fits all its manual espresso machine portafilters, and the retailer Kaffeemacher recommends 51 mm tools for the EC685. No De'Longhi page we checked states the Dedica's diameter directly. More in De'Longhi Dedica

Not according to the model list we found: a retailer lists the DLSC085 for La Specialista and Dedica Maestro models, and the EC685 and EC885 are not on it. De'Longhi's own pages for the part show no model list. More in De'Longhi Dedica

Buy one whose listing names your model code. Some sellers offer De'Longhi versions with two or three locking ears, so count the ears on your current portafilter first. If one will not lock in, see why a portafilter won't lock. More in De'Longhi Dedica

51 mm. De'Longhi says its 51 mm DLSC080 tamper fits all its manual espresso machine portafilters, and a retailer lists De'Longhi's 51 mm bottomless portafilter for La Specialista models. More in De'Longhi La Specialista

Check your model code: a retailer lists the 51 mm DLSC085 for EC9335, EC9355, EC9555, EC9665, EC9865, EC9885, EC9155, EC9255, EC9455, EC900 and EC950. De'Longhi's own pages for the part show no model list. More in De'Longhi La Specialista

The tamper size is the same, since De'Longhi says its 51 mm tamper fits all its manual machine portafilters. Bottomless portafilters differ by model: the DLSC085 list includes La Specialista codes but not the Dedica EC685 or EC885. More in De'Longhi La Specialista

58 mm, according to US retailer Whole Latte Love. Gaggia's own pages give 58 mm for the current Classic E24 and for its Classic filter-holder. More in Gaggia Classic Evo Pro

Gaggia's own tamper for the Gaggia Classic is 58 mm, and Normcore lists 58.5 mm for the Classic and Classic Pro. If you fit a precision basket, use its maker's size: VST specifies 58.40 mm. More in Gaggia Classic Evo Pro

Gaggia's own wooden-handle tamper for the Gaggia Classic is 58 mm, while Normcore lists 58.5 mm for the Classic and Classic Pro. With a precision basket, use the basket maker's size, such as VST's 58.40 mm. More in Gaggia Classic E24

Both are listed at 58 mm: Gaggia gives a 58 mm filter-holder for the Classic E24, and Gaggia North America a 58 mm portafilter for the Classic Pro E24. More in Gaggia Classic E24

Buy one listed for the Gaggia Classic rather than a generic E61 version; some sellers make them separately. Do not shop by the number alone: Gaggia labels its own bottomless filter-holder 59 mm while listing its standard filter-holder at 58 mm. More in Gaggia Classic E24

Normcore lists 58.5 mm for the Silvia, which has a 58 mm portafilter. If you use a precision basket, VST specifies 58.40 mm and IMS lists 58 or 58.4 mm for its B70 baskets. More in Rancilio Silvia

The portafilter size is the same: Rancilio gives both a 58 mm portafilter, and Normcore lists the same tool sizes for the Silvia, Silvia Pro and Pro X. More in Rancilio Silvia

Rancilio lists a 58 mm portafilter with 8 g and 18 g baskets and a wood tamper with a stainless flat base. More in Rancilio Silvia Pro X

Normcore lists 58.5 mm puck screens for the Silvia Pro X, along with a 58.5 mm tamper and a 58 mm funnel. More in Rancilio Silvia Pro X

The portafilter size is the same: Rancilio gives both a 58 mm portafilter, and Normcore lists the same tool sizes for the Silvia, Silvia Pro and Pro X. More in Rancilio Silvia Pro X

No. The Anna uses Lelit's LELIT57 group, and Normcore says it 'Requires 57mm specific tools', listing a 57.5 mm tamper and a 57 mm screen and funnel. A 58 or 58.5 mm tamper is wider than that. More in Lelit Anna

Normcore lists 57.5 mm. Lelit publishes no diameter and refers only to LELIT57 barista tools, so a tamper sold for the LELIT57 group is the safer choice. More in Lelit Anna

Lelit's LELIT57 filter set (PDCFT57) covers a 7-9 g single, 14-18 g and 18-21 g doubles, and pods, pressurized and blind filters, 'For machines with LELIT57 group'. More in Lelit Anna

Lelit does not call it one: its spec sheet describes an L58E group with mechanical pre-infusion, compatible with LELIT58 barista tools. Normcore's compatibility guide labels it 'E61 Group Head'. More in Lelit Mara X

The Mara X ships with a LELIT58 stainless steel tamper. For an aftermarket one, Normcore lists 58.5 mm. More in Lelit Mara X

Lelit's spec sheet lists a LELIT58 filterholder, IMS-made LELIT58 filters, a blind filter and a LELIT58 stainless steel tamper. More in Lelit Mara X

Yes. Lelit's spec sheet lists a LELIT58 bottomless filterholder along with a standard LELIT58 filterholder, IMS-made LELIT58 filters, a blind filter and a LELIT58 stainless steel tamper. More in Lelit Bianca

Lelit describes an 'L58E group, paddle system' that takes LELIT58 tools and does not call it E61. Normcore's guide labels it 'E61 Group Head'. More in Lelit Bianca

Normcore lists 58.5 mm puck screens for the Bianca, with a 58.5 mm tamper and a 58 mm funnel. More in Lelit Bianca

Normcore lists 58.5 mm for the Victoria. Lelit's spec sheet includes a tamper but gives no size or material for it. More in Lelit Victoria

Lelit's documents disagree: the Victoria spec sheet lists a 9-11 g single filter, while the product page lists 7-9 g. Lelit's separate LELIT58 filter set has a 9-11 g single. More in Lelit Victoria

58.4 mm. Profitec's PRO 400 & JUMP manual recommends its stainless steel tamper with a 58.4 mm diameter and a tamping pressure of about 20 kg. More in Profitec Pro 400

Normcore's compatibility guide lists 58.5 mm for the Pro 400-800, and Profitec sells a 58.5 mm walnut tamper for other models. Profitec's own manual for the PRO 400 says 58.4 mm. More in Profitec Pro 400

Profitec's manual says to clean the brew group with the blind filter and group cleaner after about 90-140 cups, and warns that doing it too often degreases moving parts. See also how to backflush. More in Profitec Pro 400

Do not assume so. Profitec describes the GO 2.0's group as a ring brew group, not an E61, and the machine already ships with a bottomless portafilter. More in Profitec GO

Normcore lists 58.5 mm for the GO. Profitec's GO 2.0 page, product card and manual do not give a diameter for the included tamper or the portafilter. More in Profitec GO

Profitec lists a bottomless portafilter with silicone attachments, a blind filter and a coffee tamper. More in Profitec GO

ECM lists it with the ECM-61 brew group, which ECM describes as a further development of the Faema E61. Its product page just calls it the ECM brew group. More in ECM Classika PID

Normcore lists 58.5 mm for the Classika. ECM ships a tamper with the machine but does not state its size, and if you fit a VST precision basket, VST specifies 58.40 mm. More in ECM Classika PID

ECM's manual says to clean the brew group with the blind filter and half a spoon of detergent after about 90-140 cups, and warns that cleaning with detergent too often degreases moving parts. See also how to backflush. More in ECM Classika PID

Flair says 58.4 mm is the best fit for its standard Low-Flow basket and 58.5 mm is the largest it recommends. More in Flair 58

Normcore lists the same sizes for the Flair 58 as for many 58 mm machines: a 58.5 mm tamper and puck screen and a 58 mm funnel. Flair itself prefers a 58.4 mm tamper. More in Flair 58

45.5 mm. Flair says the PRO 2 basket is 46 mm and that its included tamper and recommended third-party tools are 45.5 mm. More in Flair PRO 2

No. The PRO 2 takes 45.5 mm tools for a 46 mm basket, while Flair recommends a 58.4 mm tamper for the Flair 58. More in Flair PRO 2

Cafelat's own Robot leveling tamper is about 57.4 mm, for a Professional basket that measures 57.8 mm inside. A standard 58 or 58.5 mm tamper is wider than the basket. More in Cafelat Robot

Cafelat calls them 58mm filter baskets, the same size as professional semi-automatic machines, but the Professional basket measures 57.8 mm inside and is 60 mm deep. Treat 58 mm as a nominal size. More in Cafelat Robot

Cafelat suggests initially aiming for 6-7 bar, which it measured on traditional lever machines, and gives a 16 g dose yielding a 32 g drink (2:1) as an example. More in Cafelat Robot