57 mm tamper base knock convex
SKU: 23910411029

57 mm tamper base knock convex

Sale price$17.84 Regular price$19.82
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Description

57 mm tamper base knock convexJoeFrex 57 mm Tamper Base KNOCK CONVEX All KNOCK CONVEX bottom parts have a slightly convex pressing surface to compress the coffee grounds. Why the name Knock? After pressing the coffee grounds for the first time, lightly tapping on the side of the filter holder to dislodge any remaining grounds. Subsequently, it can be pressed again. To avoid using the base of the tamper or the wooden handle for this light tap on the filter holder, risking damage to

JoeFrex - 57 mm Tamper Base KNOCK-CONVEX

All KNOCK CONVEX bottom parts have a slightly convex pressing surface to compress the coffee grounds.

Why the name Knock?

After pressing the coffee grounds for the first time, lightly tapping on the side of the filter holder to dislodge any remaining grounds. Subsequently, it can be pressed again. To avoid using the base of the tamper or the wooden handle for this light tap on the filter holder, risking damage to both the tamper and the filter holder arm, you can now tap with the integrated silicone ring in the base.

Why the name CONVEX?

Normally, the surface of the coffee grounds pressed into the filter holder doesn't play a significant role; whether it's flat or concave, there's enough space between the coffee surface and the dispensing group so that the water can be evenly distributed over the coffee grounds and pass through them evenly. However, if a flat filter is used in the arm, or if much more than 7g (for a one-cup filter) or 14g (for a two-cup filter) is used, the space between the coffee grounds and the dispensing group may be too small for optimal water distribution. For this purpose, the Convex Tamper Base can be used, as it leaves a cavity in the middle of the pressed coffee, for better water distribution.

The dimensions of the tamper to be used vary depending on the manufacturer. Below is a list of manufacturers and their required dimensions for tampers:

- Delonghi BAR Tamper: 51mm
- Dalla Corte Tamper: 54mm
- ECM Tamper: 58mm
- Elektra Micro Casa S1 Tamper: 49mm
- Elektra Tamper: 58mm
- Faema Tamper: 58mm
- Fiorenzato Tamper: 58mm
- Francis! Francis! X1 Tamper: 56mm
- Gaggia Tamper: 58mm
- Grimac Tamper: 58mm
- Isomac Tamper: 58mm
- IZZO Lever Tamper: 53mm
- IZZO Tamper: 58mm
- Krups Tamper: 48/49mm
- La Cimbali Tamper: 58mm
- La Marzocco Tamper: 58mm
- La Pavoni Club Combo / Duetto Tamper: 58mm
- La Pavoni Europiccola Tamper: 48/49mm
- La Pavoni Manual Lever for Domestic Use (from 1999 onwards) Tamper: 51mm
- La Pavoni Manual Lever for Domestic Use (up to 1999) Tamper: 48/49mm
- La Pavoni Lusso Tamper: 53mm
- La Pavoni Millennium Tamper: 51mm
- La Pavoni Professional Tamper: 51mm
- La Pavoni Pub Tamper: 58mm
- La Scala Tamper: 58mm
- La Spaziale Tamper: 53mm
- Nuova Simonelli Tamper: 58mm
- Quickmill: 58mm
- Rancilio Tamper: 58mm
- Reneka Tamper: 57mm
- Saeco Tamper: 53mm or 51mm
- San Marco Tamper: 54.4mm or 53mm
- Vibiemme Tamper: 58mm
- Wega Tamper: 58mm

Shipping Notes
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Exchange/Return Notes
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SKU: 23910411029

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★★★★★ 5
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Size: XX-Large, Color: Multicoloured C (5-pack)
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Reviewed in the United States on April 8, 2026
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Janet R Geisler
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★★★★★ 4
Bamboo is an amazing fabric
Size: Large, Color: Multicoloured I (5-pack)
Comfy and soft . I’ve never worn boy shorts before so takes adjusting to. Legs roll sliding pants up but easy to adjust and smooth before zipping up then all day comfort. When I wear skirts or shorts they are perfect for that! I use to wear bike pants under skirts that don’t have to anymore. I like that they don’t creep up like regular underwear. I’m a new fan of bamboo fabric and bought briefs in bamboo as well.
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Cheryl L. Genet
Birmingham, US
★★★★★ 5
The softest, stretchiest, perfect underwear!
Size: Large, Color: Multicoloured F (5-pack)
I have struggled for years to find underwear that didn't ride up. I like bamboo, but had the same problem with them. These Bamboo Cool Boyshorts not only solved my problem, but they are so soft and stretchy that it almost feels sensual pulling them on. They never ride up, roll down, they fit perfectly, and are always super comfortable. I even persuaded my husband to buy the men's version and he loves them too. And I should add, I never write reviews!
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Reviewed in the United States on April 25, 2026
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Amy
Cuba, US
★★★★★ 5
YES!
Size: Medium, Color: Multicoloured D (5-pack)
I don't give too many items 5 stars, but these are reorder worthy! I bought these a year ago, and am now going back for another 5 pack; not because my first order wore out, but because they are still SO great, I want more! These are my go to for under dresses, skirts, & flowy pants where I want full coverage, but no panty lines! AND bonus, sweat absorption. The leg openings are a tight when I first put them on, but they stay put and are very comfortable. I get my normal size
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Comfortable but NOT SEAMLESS.
Size: Medium, Color: Multicoloured C (5-pack), Size: Medium, Color: Multicoloured C (5-pack)
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