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 the 51mm portafilter basket. [Preferred Material] The Bottomless Portafilter is made of food-grade Stainless Steel, eco-friendly and non-, more sanitary and , has the 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 the problem of coffee splashing. This espresso puck screen also helps prevent coffee grounds from sticking to the espresso machine shower screen, keeping the 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 the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.