General description This 51mm bottomless portafilter is designed for various coffee machines including ECP3420, EC155, BCO430, and EC260. It features a stainless steel filter basket and a unique bottomless design that allows you to observe the extraction process, helping to identify any defects and ensuring a more consistent and delicious espresso. Technical specifications Diameter: 51mm Material: ABS and food-grade stainless steel Color: Black and Silver Compatibility and accessories Compatible with models: 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 Includes: 1 x 51mm portafilter with stainless steel filter basket Installation Easy to install with a detachable design for quick disassembly Usage Observe the flow column, flow rate, and color during extraction for better quality control Helps in judging the uniformity of