General description The 51 cup stainless steel water 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 filter basket, making the process of loading and tamping much cleaner and easier. Technical specifications Material: 304 stainless steel Packing 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 The funnel is designed to fit tightly on the outer edge of the filter basket, allowing for effective tamping. The inner diameter matches the hand filter basket for seamless use. Other information Easy to clean: dishwasher safe, can be rinsed with water, or cleaned with a brush