MHW-3BOMBER Magnetic Dosing Ring 58 mm – light and clean dosing
- Free shipping to Switzerland and Liechtenstein from CHF 60
Selected by Anke and Yalcin
4.9Google · 301 reviews · Bern5.0Tripadvisor · 11 reviews · Bern
Selected by Anke and Yalcin
4.9Google · 301 reviews · Bern5.0Tripadvisor · 11 reviews · Bern
A brief touch and the ring is in place: ten magnets pull it onto the rim of your portafilter. You grind straight into it, the grounds land in the basket instead of on the drip tray, and after distributing you lift the ring off again with two fingers.
The opening flares out towards the top like a funnel and so also catches grounds that would otherwise fall next to the basket. At the bottom, the ring hangs on the outside of the basket rim, so it takes up no space in the basket. It is made of an aluminium alloy, which makes it very light.
The ring is made for 58 mm portafilters. Magnets only hold on a magnetic rim. If you are unsure, briefly hold an ordinary magnet to the rim of your portafilter: if it sticks, the ring will hold too.
In our experience it is enough to knock out the ring after grinding and wipe it with a damp cloth now and then. Then let it dry well.
| Brand | MHW-3BOMBER |
|---|---|
| Type | Magnetic dosing ring |
| Fits | 58 mm portafilters with a magnetic rim |
| Magnets | 10 |
| Shape | flared like a funnel at the top |
| Material | aluminium alloy |
| Colour | black, matte |
| In the box | 1 dosing ring |
For you if you grind straight into the portafilter and then have to wipe the counter. For everyone who stirs before tamping and does not want to push anything over the rim. And for everyone looking for a simple, light tool that simply disappears into the drawer after use. You will find more tools from the brand at MHW-3BOMBER.
Tip from our café: When you grind straight into the portafilter, the coffee sits as a mound in the middle. In our experience it pays to stir with the ring on and only then take it off, so nothing falls over the rim when you lift it. That works with the dark, chocolatey Cozy Chocolate just as well as with the light Wild Peach, where even distribution helps bring the peach note cleanly into the cup. For a strong espresso with milk, Very Nutty fits, with plenty of body and hardly any acidity. You will find all our coffees under coffee beans. That is our recommendation, one of many.
It is made for 58 mm portafilters and holds on the rim with ten magnets. The rim has to be magnetic for this.
No. It hangs on the outside of the basket rim, the basket itself stays free.
An aluminium alloy in matte black. That makes it very light.
Knock out the coffee and wipe the ring with a damp cloth now and then. Then let it dry well.
Delivery takes 2–4 working days, throughout Switzerland and to Liechtenstein. Click and Collect is available in Bern and Zurich.
Drop by one of our showrooms: Bern (Gerberngasse 44) or Zurich Oerlikon (Hagenholzstrasse 50b). It is best to ask us briefly beforehand whether the ring is on site.
Interactive tool
Puck Prep Workshop: assembling your setup
From dosing to WDT to tamping: put together your own puck-prep setup and watch live as the puck becomes more even.
Explore more →You order directly through our online shop. If you have questions, we're happy to help — online or in person — with experience from our roastery, cafés and showrooms.
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Reach us directly · [email protected]Who is behind the selection

Anke Wolf
Founder and owner, coaching, team and processes
Swiss federal certificate as adult educator, CAS Coaching in Organisations (FHNW), over 10 years in adult education and coaching. With us she is the host in our cafés, leads and coaches the team, coordinates our processes and looks after our partnerships with foundations.

Yalcin Akpinar
Co-founder, equipment and sensory
Graduate food chemist from the University of Hamburg, over 15 years in the international flavour industry, patents in flavour technology. With us he is responsible for roast profiles, bean selection and the choice of machines and grinders.
What our guests say
“While the coffee is stellar, the plethora of equipment and hospitality of Anke and Yalcin take it to another level.”
„Toller Show-Room! Danke Kati für das supernette Gespräch und die gute Beratung!“