1、51mm Stainless Steel Portafilter Basket: Filter basket with ultra fine holes to make sure the delicate taste of coffee, get smooth and intense coffee taste more. Let you enjoy a cup of delicious coffee in your leisure time. 2、Efficient Extraction: Designed with the maximum number of holes on the 51mm filter basket with optimal hole size for seamless coffee extraction. 3、Compatibility: 51mm coffee powder filter bowls are suitable for semi automatic coffee machine or 51mm coffee portafilter, practical accessory for coffee machine. 4、Stainless Steel Material: Reusable coffee filters are made of food grade stainless steel material, anti rust, wearproof, durable and practical. Atoxic, healthy, environmental protection. 5、Easy to Use: Coffee portafilter basket is easy to install and easy to use, the essential tools for every coffee lover and self making coffee, suitable for household, milk tea shop, bar, coffee shop, etc.