*HIGH MATERIAL: The faucet spool is made of high-quality brass and ceramic, which is and rust-free for long-term use. *GOOD SEALING: This tap valve replacement has a black rubber retaining washer that is easy to use, seals the faucet well, prevents the faucet from leaking, and saves the need to change the faucet again, making your life easier. *TWO COLORS: The red and blue O-rings on the bottom of the spool make it easy to distinguish and make installation easier. Red is rotated clockwise to open the faucet, counterclockwise to close, and blue is opposite to red. Please assemble according to your faucet characteristics during installation. *WIDELU USE: Suitable for faucets in bathrooms, kitchens, etc. Can be used for single or double hot and cold water taps.There are 20 gears on the top of the valve core, It is the most common size of the tap cartridge valve. *NOTE: Please read the size picture carefully before buying. We recommend that you take off the old faucet. To compare sizes, ensure compatibility., Manufacturer: FiTspi