SKU: 83518279203

58mm tamper base knock convex

Sale price$17.84 Regular price$19.82
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Description

58mm tamper base knock convexJoeFrex 58 mm Tamper Base KNOCK CONVEX All KNOCK CONVEX bottom parts have a slightly convex pressing surface to press the coffee grounds. Why the name Knock? After pressing the coffee grounds for the first time, lightly tap (from English Knock) on the side of the filter holder to dislodge any remaining grounds. This allows for subsequent pressing. To avoid using the base of the tamper or the wooden handle for this light tap on the filter holder,

JoeFrex - 58 mm Tamper Base KNOCK-CONVEX

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

Why the name Knock?

After pressing the coffee grounds for the first time, lightly tap (from English Knock) on the side of the filter holder to dislodge any remaining grounds. This allows for subsequent pressing. 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 silicone ring integrated into 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, you can use the Convex Tamper Base, 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. Here 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 Tamper 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

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SKU: 83518279203

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Russ
Alexandria, US
★★★★★ 3
Underwhelming
Color: silver
Too much hype. It just holds the laptop. Buy something cheaper. The slide adjuster isn’t useful to me at all.
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Reviewed in the United States on May 9, 2026
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beth
Battle Creek, US
★★★★★ 5
Useful but not perfect
Color: silver
Useful, but typing with laptop perched on it is unsteady. I use a separate keyboard.
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Reviewed in the United States on April 2, 2026
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vics
Lowell, US
★★★★★ 5
Why are people trying to type on a laptop stand?
Color: silver
So the overwhelmingly negative reviews you'll notice for this product specifically surround the "bounciness" of this stand when someone is typing on it—however what is confusing to me is how people are purchasing a laptop stand in theory to optimize their ergonomics, yet also stretching their arms out and elevating them to type on said laptop once it's raised. the point of a laptop riser/stand is to elevate the screen so that you can maintain a more natural posture. One would assume you have an external keyboard to use in conjunction with your laptop once you place it on a RISER, because the idea is to elevate your laptop as a SCREEN and then have a level/flat surface to type on, thereby alleviating any awkward hunching or neck strain looking down or anywhere not naturally eye-level. as it is, it's a perfectly functional and elegant laptop riser. I don't find myself wanting to adjust the height often if ever, but in the one or two instances I experimented with it, found no mechanical issues. It looks nice with Apple hardware and allows me to have my laptop's screen flush with the bottom edge of my additional external monitor, so it serves my purposes well. for people complaining about how it bounces when they type on it ... STOP typing on your laptop's keyboard when you have it elevated on a riser! this defeats the purpose and probably also makes your arms tired—buy an external keyboard!
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Reviewed in the United States on December 2, 2020
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Chaithanya Kota
Los Angeles, US
★★★★★ 5
Perfect Nightstand Organizer and Looks Amazing
Color: Dark Brown
This valet tray is exactly what I was looking for. The wood looks great and feels sturdy, and it keeps all my everyday items in one place. I use it for my keys, wallet, watch, and phone, and my nightstand looks much neater now. Its great to keep all the thing you need when leaving the house in one place. It’s the perfect size, well made, and looks nice enough to leave out on display. Would definitely recommend this if you want an easy way to keep your essential items organized or need a solid gift idea.
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Reviewed in the United States on January 21, 2026
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Michael
Birmingham, US
★★★★★ 5
Great product
Color: Dark Brown
Can't complain at all. For the price it is perfect. Looks great, does it's job flawlessly. Highly recommend.
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Reviewed in the United States on December 31, 2025

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