Description: Food-grade stainless steel material, environmentally friendly, durable, high temperature resistant, can be cleaned repeatedly, use more assured. Multi-layer combination, high strength, good filtering effect, suitable for a variety of espresso machines, water flow is more stable. Convenient and simple to use. After pressing the powder, put the filter directly on the powder cake, which effectively isolates and does not affect the water flow pressure. Can improve water distribution and eliminate channeling, and easy clean to remove any grounds from within. Keeps brew head clean, perfect addition to espresso brewing. Specification: Material: 316 Stainless Steel Size Chart: 51mm 2mm Thick, filtering accuracy 150um 51mm 1mm Thick, filtering accuracy 50um 53.5mm 2mm Thick, filtering accuracy 150um 53.5mm 1mm Thick, filtering accuracy 50um 58.5mm 2mm Thick, filtering accuracy 150um 58.5mm 1mm Thick, filtering accuracy 50um Package Includes: 1 Piece Coffee Portafilter Puck Screen Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!