58mm Magnetic Dosing Funnel V2, MATOW Stainless Steel Espresso Dosing Ring with 8 Magnets Compatible with All 58mm Portafilter Review (2026)

What it is for

This is a dosing funnel that clips onto a 58mm portafilter to widen the target area while you distribute and stir ground coffee before tamping. Without one, loose grounds tend to spill over the basket rim and end up on the counter or on the group head gasket, especially when using a WDT tool to break up clumps. The funnel extends the walls upward so grounds that would otherwise miss the basket fall back in instead. It is made from stainless steel, which is the more common material for these funnels compared with lighter aluminum alloy versions and should hold up to repeated tapping and rinsing without corroding.

Eight magnets for a secure hold

The defining feature of the V2 version is a ring of eight magnets built into the base, up from fewer magnets on some earlier and competing designs. In practice this is meant to keep the funnel seated through vigorous WDT stirring and even while the portafilter is tipped or briefly inverted, rather than sliding or popping off mid-dose. Several similar magnetic funnels on the market use four or six magnets, so eight is on the stronger end for this category. The stainless build also means you can tamp with the funnel still attached in many cases, since it will not deform under normal tamping pressure the way a thinner metal ring might.

The catch: your basket needs to be magnetic

The magnets need something ferrous to grip, and that means a steel portafilter basket or rim. Many modern precision baskets, and some portafilter bodies, are made from non-magnetic stainless steel or other alloys specifically because that is common in coffee equipment, and on those the magnetic hold is reported to be noticeably weaker than on a magnetic basket. Before buying, it is worth checking whether your specific basket or portafilter rim is one a magnet actually sticks to, since a funnel that will not stay attached defeats the point of a magnetic design, forcing you to hold it in place by hand instead.

Fit and everyday use

Being sized for 58mm portafilters, this funnel is meant to work across the wide range of machines that use the 58mm standard, from prosumer machines to many commercial group heads, rather than being tied to one brand. Stainless steel construction means it rinses clean of oily grounds residue under warm water and will not pick up smells or stains the way some coffee tools do over time. It adds one more small part to your dosing routine, which some users prefer to skip in favor of dosing straight into the basket, but for anyone who finds themselves cleaning up spilled grounds regularly, it removes that step.

Who should buy it

This funnel is a good match for home baristas with a 58mm setup and a magnetic basket who want less mess and more confidence while stirring with a WDT tool. It is a weaker choice if your portafilter or basket is non-magnetic, since the main advantage over a simple non-magnetic dosing ring largely disappears and you may end up holding the funnel in place by hand anyway. For most standard steel baskets that ship with prosumer machines, the eight magnet design should hold reliably enough for daily use, and the stainless build should outlast lighter aluminum alternatives sold at a similar price. Anyone upgrading from a cheaper four-magnet funnel should notice a firmer hold during vigorous stirring, provided the basket underneath is magnetic to begin with.

Frequently asked questions