51mm bottomless portafilter with a 51mm stainless steel filter basket, the filter basket's fine-perforated design enables more consistent and effective filtering of coffee grounds, and it is suitable for use compatible with 51mm portafilter basket. [Preferred Material] The Bottomless Portafilter is made of food-grade Stainless Steel, eco-friendly and non-, more sanitary and , has characteristics of oxidation resistance, resistance, rust resistance and durability. [Fix Channeling] Coffee spraying, sputtering, channel effects, and other issues may be caused by uneven distribution of coffee powder. By using puck screen and filter baskets, you can further fix channels and optimize problem of coffee splashing. This espresso puck screen also helps prevent coffee grounds from sticking to espresso machine shower screen, keeping shower screen clean. 51mm Bottomless Portafilter products are only suitable for use with 3 ears. Color:As Shown Material:plastic+metal Package Contents: 1 * Bottomless Portafilter 1 * Filter Basket Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.