MHW-3BOMBER
MHW-3BOMBER Magnetic Coffee Dosing Ring
Best accessory for home baristas seeking a cleaner, more consistent espresso workflow.
Elevate your espresso routine with the MHW-3BOMBER Magnetic Coffee Dosing Ring. Designed to eliminate messy counters and wasted grounds, this essential barista tool features powerful embedded magnets for a secure, stable attachment to your portafilter during grinding. Its unique flared design rests on the rim, ensuring it never compresses your coffee bed, allowing for a more even tamp and superior extraction. Crafted from durable, food-safe aluminum alloy or stainless steel, this ring promotes precision and consistency in every shot, making daily preparation cleaner and more efficient for the home barista.
$30.95
Owner Satisfaction
4.7
/ 5
Category Rank
22
/ 879
#22 in Coffee Grinder Accessories
Price vs Category Average
-57%
Below average
Material
Durable, food-safe aluminum alloy or stainless steel
/ Durable, food-safe aluminum alloy or stainless steel
Who it's for
- Home baristas tired of cleaning up coffee grounds
- Workflow-focused users needing a stable, hands-free grinding experience
- Precision-minded enthusiasts perfecting their WDT distribution technique
Who should skip it
- Collectors protective of their portafilter's pristine cosmetic finish
- Owners of grinders with unique or non-standard chute designs
- Speed-focused baristas prioritizing the fastest possible morning routine
Performance breakdown
Magnetic Stability
Powerful magnets ensure the ring stays locked firmly during heavy grinding.
Workflow Efficiency
Eliminates counter mess and streamlines the puck preparation process significantly.
Build Integrity
Premium alloy construction offers a professional feel and long-term durability.
Tamping Precision
Flared rim design prevents ground compression for a perfectly level bed.
Compatibility Range
Multiple size options cover almost every standard portafilter diameter available.
Maintenance Ease
Simple to wipe clean, though hand-washing is required for material longevity.
Key Specs
Material
Durable, food-safe aluminum alloy or stainless steel
Compatibility
Available in 51mm, 53-54mm, and 58mm sizes
Design
Outward-locking design rests on the rim
Feature
Rust and corrosion-resistant construction
Diameter
51 mm
Magnetic Attachment
Yes
Accessory Type
Dosing Cup
Dishwasher Safe
No
Features
- Secure magnetic portafilter connection
- Flared design prevents ground compression
- Contains grounds for a cleaner workspace
- Improves tamping consistency
- Simplifies espresso workflow
- Durable, food-safe construction
- Promotes precise puck preparation
- Reduces coffee waste
What customers say
Users consistently praise the MHW 3BOMBER dosing ring for its superior quality and effortless usability. The strong magnetic connection is a standout feature, ensuring the ring stays firmly attached to the portafilter and effectively eliminating messy spills during grinding. Reviewers highlight the solid metal construction and smooth finish, noting the accessory feels premium and durable. This simple design upgrade significantly streamlines the coffee preparation workflow, making it a highly valued tool for home baristas seeking precision and cleanliness.
Know before you buy
You should measure the inner diameter of your portafilter basket. This dosing ring is available in 51mm, 53-54mm, and 58mm sizes to match standard home and commercial espresso machine baskets.
The magnets are embedded specifically to secure the ring to the steel rim of your portafilter. They are not strong enough to affect the internal components of your grinder or the accuracy of your digital scale.
No, this dosing ring is not dishwasher safe. We recommend rinsing it with warm water and wiping it dry with a soft cloth to maintain the finish and integrity of the material.
The flared design is specifically engineered to rest on the rim of the basket rather than inside it. This ensures the ring does not compress the coffee grounds, allowing you to achieve a level, consistent tamp without removing the ring first.
It is designed to fit standard baskets that have a magnetic rim. If your portafilter is made of a non-magnetic material or has a unique shape, the magnetic connection may not be secure.
Still have a question?
Ask Hayley anything about this product before you decide.