1. The faucet spool is made of high quality brass and ceramic material, which is durable and rust-proof for long term use. 2. This replacement faucet features an easy-to-use black rubber locking washer, seals the faucet well, prevents faucet leakage and avoids the need to change the faucet again, making your life easier. < p>3. Red and blue O-rings on the bottom of the spool make it easy to distinguish and make installation easier. Red is turned clockwise to open the faucet, counterclockwise to close it, and blue is the opposite of red. 4. Ceramic faucet valves for faucets in bathrooms, kitchens, etc. Can be used for single or double hot and cold water faucets. 5. Please carefully check the dimensions to make sure it is compatible with your faucet before purchasing.