[Avoid Wasting]This dosing funnel can prevent the waste of coffee ground when it spills over and keep your desk clean. [FOR 54mm Portafilter]Designed to work with the 54mm Portafilter baskets including Express, Pro, Press, Bambino Plus, Infuser and Duo-Temp Pro. [Easy To Clean&Use]You simply rinse it with running water after use, clean it with a brush or sponge, and store it in a cool, dry place.You only need to place the funnel on the top of the portafilter and grind, distribute and compact at the same time. [Upgrade Design]The buckle upgrade design fits tightly and is not easy to slip off.It can be easily installed on 54mm Portafilters to efficiently plug coffee powder into it without hand holding. [Quality Material]This dosing funnel is made of premium aluminum metal, non-rust nor , food grade material, safe to your family's health.