MHW-3BOMBER Magnetic Dosing Ring Yu Series 58.35 mm – cleanly from grinder to basket
- 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
You have the portafilter ready, put the Yu ring on, and you can feel it pull itself onto the rim. The grounds trickle into the wide opening instead of onto the counter and drip tray. Even if you stir afterwards, the coffee stays where it belongs.
The ring holds 36 magnets. They hold it on the outside of the portafilter rim, so the ring does not reach into the basket and takes up no space there. It is made of stainless steel and black aluminium.
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.
The ring belongs to the Yu series by MHW-3BOMBER, which also includes the Cyclone Needle Distributor.
In our experience it is enough to knock out the ring briefly after use and wipe it with a damp cloth now and then. Then let it dry well.
| Brand | MHW-3BOMBER |
|---|---|
| Series | Yu |
| Type | Magnetic dosing ring |
| Fits | 58 mm portafilters with a magnetic rim |
| Magnets | 36 |
| Attachment | on the outside of the portafilter rim |
| Material | stainless steel, aluminium |
| Look | stainless steel with black aluminium band |
| Weight | 100 g |
| In the box | 1 dosing ring |
For you if you grind straight into the portafilter and the grounds have been landing next to the basket. For everyone who stirs before tamping and does not want to push anything over the rim. And for home coffee bars where stainless steel and black already set the tone.
Tip from our café: When you grind straight into the portafilter, the coffee piles up in the middle. In our experience it pays to distribute first with the ring on and only then take it off: that way nothing falls over the rim when you lift it, and your dose stays exact. It pays off with every bean, with Cozy Chocolate and its dark, chocolatey profile just as with Nutty Delight, our nutty blend from Brazil and India. With the elegant single origin Jungle Flower from Peru, in our experience you can taste even small deviations in the dose. You will find more coffees under coffee beans. That is our recommendation, one of many.
It is designed for 58 mm portafilters. The magnets only hold on a magnetic rim. If in doubt, briefly hold an ordinary magnet to the rim of your portafilter.
No. It sits on the outside of the portafilter rim and does not reach into the basket.
Stainless steel and black aluminium. It weighs 100 g.
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!“