Double-layer Filter Screen: The filter screen is 8911 mesh, the filtration precision is 0.18mm. Unicompatible for m distribution of filter holes, effective flow diversion. Improve the unicompatible for mity of extraction. Exquisite Craftsmanship: And the thickness of this puck screen is 0.8mm. It is thinner than the normal espresso puck screens, so you don't have to worry about having to deliberately reduce the amount of powder. If there are internal screw in your brewing head, we do not recommend to use the puck screen. Keep the Brew Head Clean: The espresso puck screen effectively separates the coffee powder from the brewing head, allowing it to stay clean. It is easier to clean than most other puck screens on the market, fine powder cannot be hidden, and the usage time may be extended. Reusable Coffee Filter: Made of 304 Stainless Steel, healthy and safe, as long as it is cleaned after each use, it can be used compatible for a long time. PS: Not recommended compatible for dishwasher washing.