[Compatibility] This 51mm two-ears portafilter is compatible with ECP3420, EC155, BCO430, EC260, and other two-ears coffee machines. [Filter Basket Included] Includes a 51mm stainless steel filter basket, compatible with standard 51mm filter basket systems. [Extraction Improvement] The bottomless design allows observation of the espresso flow, including stream formation, extraction rate, and color, helping identify channeling or tamping errors for improved extraction uniformity and better espresso quality. [304 Food-Grade Stainless Steel] Made from food-grade 304 stainless steel, non-toxic and food-safe, offering excellent resistance to oxidation, corrosion, and rust, ensuring durability and hygiene. [Removable & Easy to Clean] Features a detachable design for quick disassembly, simple use, and thorough cleaning without hard-to-reach areas. Compatible with: BCO420, BCO430, BCO432, EC152, EC155, EC155M, EC156B, ECO310, EC0311, EC330, EC330S, EC702, EC200, EC221, EC235, EC260, ECP3420, ECP3630, ECP3220, ECP3220W, ECP3220R, ECP3120, ECP33.21, ECP35.31, ECP36.31 Material: ABS + Stainless Steel Color: Black + Silver Package Contents: 1 x 51mm Portafilter Note: Light and display settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.