This filter screen is made of durable, food-grade plastic and perfectly sized to fit the 8", 10", and 10" Anti-Splash funnels. It will fit snugly into the funnel to prevent the screen from moving and material from flowing around the sides of the screen. The fine No. 35 mesh is perfect for removing pulp or other small particulates, but many brewing applications require a coarser mesh and would easily clog the No. 35 screen.