Geann Ceramic Disc Cartridge is especially designed for single lever faucet. Comes with standard base and distributor base to suit different height of faucet handle.  Geann Ceramic Disc Cartridge with thermo cover is able to control the water with certain temperature, making it convenient and safe for users. Available Sizes:25 mm , 28mm, 35mm, 40mmVersion:Standard Base, Distributor Base Turning Range:Max opening angle: 23o Max mixing angle: 100oMaterial:Plastic, POM, etc. Certificate:NSF-61/9, cUPC, WRAS, ACS , DVGW-KTW, WaterMark Passed Test:500,000 times Life Cycle Test, Flow Rate Test, Burst Test (according to various standard such as ASME, CSA, CNS, EN200, EN817, JIS, etc.)