The filter prevents hop residue etc from beeing sucked up into the silicone hose of the FermZilla Float. Made from HDPE and 304 Grade stainless steel this product can be boiled or sanitized with most detergents.The float can be mounted in three different places on the filter, to determine how close to the surface you want to suck up liquid.Dimensions: 40.5 x 27 mm. Hose holder diameter: 7.20 mm, perfect for 6mm inner diameter silicone tube/hose. Materials: Stainless steel and plastic. design may vary.