SPARE CARTRIDGE: Low ceramic with 2 legs without KEROX ceramic disc dispenser - K35 A. Suitable for Ø 35 mm low cartridge seat mixers. Use: for Shower, Kitchen, Bathroom sink, Bidet, Bath. INSTALLATION: The ceramic cartridge you choose must be compatible with the faucet. Make sure that the cartridge positioning feet fit into the holes provided in your mixer and finally make sure that you have screwed the ring, cartridge clamp, in place, taking care not to exert too much force, at the risk to break it. If the problem of water leakage has not been solved, it is necessary to clean the tap holes, limescale and proceed with the installation. HOW TO CHOOSE A CERAMIC DISC CARTRIDGE : You must measure the outer diameter of the ceramic cartridge of your faucet, mixer, single lever to verify that you are purchasing a compatible cartridge. The diameter of the cartridge with ceramic discs is usually 25 mm - 35 mm and 40 mm. Carefully read the technical data sheets of the chosen product. PRODUCT