This is a super-smooth showerscreen that will fit E61 groupheads - replacing a standard showerscreen with this option, not only produces better extraction but reduces the build-up of coffee oils inside the screen. This technology will aid cleaning and help with the longevity of grouphead performance.The INTEGRATED MEMBRANE SHOWER SCREEN designed by I.M.S. consists of a special membrane built inside the supporting body of the shower and has a filtering capacity of 200 μM. The key feature of this product is the unique perforation design which, in addition to ensuring the best possible coffee, makes this product extremely durable and easy to clean. Manufactured as a single piece, the body is strengthened and the surface is completely smooth, and thus does not present any grind-clogging danger areas. This shower screen fits all E61 espresso machines.