Quality: Experience Far Fewer Leaks Than Traditional Rubber Washers So You Don't Have To Suffer To The Sound Of Dripping On The Road. USAGE: Turn The Water Off Easily With Just A Turn Of The Handle Durability: Ceramic Disk Washers Won't Wear Out As Quickly As Traditional Rubber Washers Design: Designed for Dura Faucet DF-NMK504 and DF-NMK852 Only Limited lifetime warranty: Dura Faucet is an American company with US-based Customer Support