Size: Inner diameter 51mm Weight: 120g Quantity: 1 PC Convenient To Use: The Stainless Steel Dosing Ring Features Lightweight And Portable, Which Makes It Easy To Use And Install, Offer You Great Convenience. Avoid Chaos And Waste - Coffee Dosing Ring Stop Wasting Coffee And Messing Up Your Work Top, With A Coffee Dosing Funnel All Of The Coffee Goes Into The Portafilter Basket, Greatly Reducing The Confusion And Difficulties In Loading And Tamping. 51Mm Espresso Dosing Funnel Stainless Steel Coffee Dosing Ring. Safe Material - Made Of Premium 304 Stainless Steel, Non-Rust And Anti-Corrosion, Food Grade Material, Safe To Your Family'S Health. Easy To Clean And Use - The Funnel Is Dishwasher Safe, You Just Rinse It With Water And Clean It With A Brush Or Sponge. As For Use, You Simply Place The Funnel On Top Of Your Portafilter While Sanding, Spreading And Tamping , And Removed Funnel Quickly When Finished.