Delta RP72773 Cartridge, Use with Hot/Cold Water, Brass, Brass, 5 in Overall Lg

Disc faucet cartridges use a valve mechanism with two ceramic discs that slide back and forth to control the temperature and flow of water. When these discs press together, they create a watertight seal, but when the faucet handle is activated, the upper disc moves to start the flow of water. These cartridges resist corrosion and are often used in modern faucets.