1Food Grade Stainless Steel: The reusable 51mm 2 cups portafilter filter basket is made of food grade stainless steel material, which is rust proof, abrasion resistant, durable, and practical. 2Wide Applications: Stainless steel coffee filter basket is a must have tool for every coffee enthusiast and self brewed coffee, suitable for homes, milk tea shops, bars, coffee shops, and more. 3Ultra Fine Filter: The stainless steel coffee filter basket uses an ultra fine filter to ensure a delicate taste of coffee, resulting in a smooth and rich coffee with a better taste. 451mm 2 cups portafilter filter basket suitable for Delonghi coffee machine and semi automatic coffee machine portafilter. It is a practical accessory for coffee machine. 5High Filtration Accuracy: The design of the 51mm portafter filter basket can effectively filter coffee grounds and foam, making the coffee taste more delicate and smooth.