HIGH-QUALITY MATERIAL: Our espresso ice ball sieve is made of 1.1 mm thick stainless steel, which is sufficiently flat to ensure quality and durability, providing you with long-lasting, high-quality coffee. Stable Extraction: The 51 mm portafilter sieve features a flat surface and uniform pore size, improving water distribution and reducing the risk of channeling. The fine holes and multi-layer sintered design promote complete extraction of coffee grounds and enhance coffee aroma. KEEP IT CLEAN: The 51 mm metal filter effectively separates coffee grounds from the group head, preventing coffee grounds buildup. This means you can enjoy your coffee without spending excessive time on group head maintenance and cleaning. Double-Layer Structure: Uses a double-layer structure. One layer has 0.3 mm small holes, and the other layer has 1.8 mm large holes. When inserting the disc into the portafilter, ensure the large hole is facing upwards to distribute hot water faster into the coffee and increase extraction efficiency. Versatile Use: Espresso filters can be used in a variety of settings: home, office, kitchen, restaurant, cafe, patisserie, and many other places. This handle filter makes an ideal gift for coffee connoisseurs. NOTE: Please ensure the size is compatible with your coffee machine before purchasing. Note: All data is measured manually, please allow 1-3cm error. Due to differences in light and screen, there may be some color differences, please refer to the actual item received.