MHW-3BOMBER Espresso Dosing Ring

You should match the size of the dosing ring to the diameter of your portafilter basket. Common sizes are 51mm, 54mm, and 58mm, so check your machine's specifications or measure the inner diameter of your basket to ensure a proper fit.

No, the magnets are embedded within the ring and are designed solely to secure the accessory to the portafilter basket. They do not affect the coffee grounds or the accuracy of your scale.

The bottom-hanging design is specifically engineered to sit inside the basket rim without obstructing the coffee bed. This allows you to remove the ring after dosing and distribute your grounds without leaving any depression marks or uneven spots before you tamp.

It is compatible with most standard portafilters in the 51mm, 54mm, and 58mm sizes. However, if you use a non-standard or precision basket with a very thick rim, the magnetic connection might be slightly less secure, though it will still function as a funnel.

Because it is made from anodized aluminum, you should hand wash it with warm water and mild soap. Avoid using abrasive sponges or putting it in the dishwasher, as these can damage the finish over time.