General description The 54 stainless steel water cup powder ring is a portable coffee machine accessory designed for 51/54/58mm portable filters compatible with Barista Express, Pro, Touch, Bambino Plus, Infuser, and Duo-Temp Pro. This coffee dosing ring helps prevent mess and waste by ensuring that all coffee grounds are directed into the movable filter basket, significantly reducing cleanup time during loading and tamping. Technical specifications Material: 304 stainless steel Packaging method: Paper box Packing size: 9 x 9 x 3 cm Weight: 120g (51mm), 155g (54mm), 195g (58mm) Installation Place the funnel on top of the hand filter while grinding, distributing, and tamping. Quickly remove the funnel when done. Usage Designed for easy cleaning; can be rinsed with water or cleaned with a brush or sponge. Dishwasher safe for convenient maintenance. Other information FDA grade material, safe for health. Tight fit allows for effective tamping.