SKU: 68705659354

55 mm tamper base knock convex

Sale price$17.84 Regular price$19.82
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Description

55 mm tamper base knock convexJoeFrex 55 mm Tamper Base KNOCK CONVEX All the lower parts of KNOCK CONVEX have a slightly convex pressing surface to compress the coffee powder. Why the name Knock? After pressing the coffee powder for the first time, lightly tap on the side of the filter holder to dislodge any remaining powder on the sides. Then 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

JoeFrex - 55 mm Tamper Base KNOCK-CONVEX

All the lower parts of KNOCK CONVEX have a slightly convex pressing surface to compress the coffee powder.

Why the name Knock?

After pressing the coffee powder for the first time, lightly tap on the side of the filter holder to dislodge any remaining powder on the sides. Then 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 powder 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 dispensed from it can be evenly distributed over the coffee powder and pass through it uniformly. However, if a flat filter is used in the arm, or if much more than 7g (for a single cup filter) or 14g (for a double cup filter) is used, the space between the coffee powder and the dispensing group may be too reduced for optimal water distribution. For this purpose, you can use the Tamper Base Convex, as it leaves a cavity in the middle of the pressed powder, for better water distribution.

The size of the tamper to be used varies according to the manufacturer. Here you will find a list of manufacturers and their required sizes for tampers:

- Delonghi BAR Tamper 51mm
- Dalla Corte 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
- IIsomac Tamper 58mm
- IZZO Lever Tamper 53 mm
- 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 (starting from 1999) Tamper 51mm
- La Pavoni Manual Lever for Domestic Use (until 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: 68705659354

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Seth
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★★★★★ 4
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Solid Anker USB C hub that does what it’s supposed to do. Ports work well and it’s easy to use right out of the box. Only downside is the hard plastic casing, it feels fine, but I could see it cracking if something heavy drops on it.
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Reviewed in the United States on February 23, 2026
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Zane
Omaha, US
★★★★★ 5
Helped transfer data from Samsung Galaxy S21 with broken screen.
Color: Black
Helped me transfer data from a Samsung Galaxy S21 with broken screen. Simple put USB C end into phone , grab HDMI cable and plug into hub , then plug HDMI end into a monitor. Then grab a wireless keyboard & mouse and plug dongle into hub. Your phone will output to monitor and you can transfer data via Smart Switch using keyboard & mouse. Will only work if phone is unlocked I found on S21.
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Reviewed in the United States on May 22, 2026
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Alien Nomad
San Leandro, US
★★★★★ 5
Anker 332 USB-C Hub (5-in-1): The Swiss Army Knife of Connectivity
Color: Black
Ever felt like your laptop was playing a cruel joke on you with its lack of ports? Enter the Anker 332 USB-C Hub (5-in-1)—the tech equivalent of a superhero swooping in to save the day (and your productivity). Port Party This hub is like the ultimate party host: it’s got a little something for everyone. Need to connect an external monitor? Boom, there’s a 4K HDMI port. Want to transfer files faster than a cheetah on a caffeine rush? It’s got two 5 Gbps USB-A ports and a 5 Gbps USB-C data port ready to go. Oh, and don’t worry about keeping your laptop charged while you’re multitasking like a boss—there’s a 100W PD-IN port to keep the power flowing. 4K HDMI: Because Why Settle for Less? Let’s talk about that HDMI port, shall we? We’re talking 4K at 30Hz, which means your Netflix binge or work presentation will look crisp, clean, and oh-so-satisfying. It’s like upgrading from VHS to Blu-ray—you won’t believe you ever survived without it. File Transfers in a Flash Remember the days when transferring files felt like waiting for dial-up internet to connect? Yeah, those days are over. With up to 5 Gbps transfer speeds, you can move files so fast that you’ll barely have time to grab your coffee before it’s done. Just think of all the time you’ll save—and how much more you can procrastinate as a result! Pass-Through Charging: Power Up, Don’t Power Down One of the worst feelings in the tech world is watching your battery icon turn red while you’re in the middle of something important. But fear not—this hub’s got you covered with up to 85W pass-through charging. So, go ahead and keep doing whatever it is you’re doing, whether it’s crushing deadlines or browsing cat memes (no judgment here). Compact and Reliable The Anker 332 USB-C Hub is compact enough to slip into your laptop bag without a second thought. And with an 18-month worry-free warranty, it’s clear that Anker has your back—just in case you get a little too enthusiastic with all those ports. Final Thought In a world where laptops keep losing ports faster than you lose socks in the laundry, the Anker 332 USB-C Hub is the perfect solution. It’s reliable, versatile, and just what you need to bring your laptop back to life. So go ahead—plug in, power up, and let the good times (and files) roll!
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Reviewed in the United States on August 20, 2024
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Pratik @ Toronto, CA
Charlottesville, US
★★★★★ 5
Excellent Product - USB C - power and data transfer!
Color: Black
It works great. I used this to connect two USB-C devices: one from the POS printer and another for charging, both connected to my tablet into one USB-C. It solved the biggest issue that I was facing.
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Reviewed in the United States on April 21, 2026
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John3.16
Whiting, US
★★★★★ 5
Great choicd
Color: Black
Work great, size is compact and out of the way.
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Reviewed in the United States on June 11, 2026

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