The faucet valve core is made of high-quality brass and ceramics, which is durable and does not rust, and can be used for a long time. This faucet valve replacement has an easy-to-use black rubber fixing gasket, which can seal the faucet well and prevent the faucet from leaking. The red and blue O-rings at the bottom of the spool are easy to distinguish, making installation easier. Suitable for most faucets, please check the size on the specification drawing carefully before buying to ensure compatibility with your faucet. The kit contains two ceramic faucet valves (1*blue and 1*red), with 2 screws, used for bathroom, kitchen, etc. faucets, can be used for single or double hot and cold water faucets.