[Compatibility] This two ears portafilter 51mm fits for ECP3420/EC155/BCO430/EC260 etc 2 ears coffee machine. [Filter Basket Included]Stainless steel 51mm filter basket included and compatible with 's stock 51mm filter basket [Extraction Improvement]the bottomless design can help observed the flow column, flow rate, color, flow column , etc., find the defects and errors before extraction, and better judge the uniformity of extraction, thereby making it more delicious and more consistent Espresso [304 Food Grade stainless steel]The Bottomless Portafilter is made of food-grade Stainless Steel, eco-friendly and non-toxic, more sanitary and , has the characteristics of oxidation resistance, corrosion resistance, rust resistance and durability [Removable & Easy to Clean]- The detachable design is convenient and quick to disassemble, easy to use, and easy to clean without dead corners. Compatible with: for BCO420, BCO430, BCO432, EC152, EC155, EC155M, EC156B, ECO310, EC0311, EC330, EC330S,