Material: Tap cartridge is made of ceramic + plastic, durable for 500,000 times' life cycle test standard. Design: The ceramic sheet adopts a dry pressure process, not easy to wear, no pollution to water quality, ceramic type can avoid water leakage and save water. Feature: If your taps are leaking or won't shut off, then you may just need one of these replacement cartridges, instead of having to replace the whole tap. Wide application: Ideal for shower faucet, bathroom faucet, toilet faucet, etc. If you got a leaking tap, this replacement ceramic cartridge may be just what you need, it’s a great replacement for the old one.