This is a faucet seat and spring set, designed for use with Glacier Bay faucets. Typically they are used with dishwasher lines. The seat is constructed of rubber while the spring is constructed of steel. It can be used in the installation of other faucets, just make sure to double check the dimensions of your faucet seat and steel spring before ordering or installing. Each package contains 1 rubber faucet set and 1 steel spring.