Good Sealing: The bottom of our ceramic disc head is completely replaced by rubber O-rings with threaded rings, which can prevent your faucet from leaking and you don't need to replace the faucet again. Easy to Assemble Installation: Ceramic cassette faucets have blue and red O-rings on the bottom for easy identification. You need to open the faucet clockwise (blue) and counterclockwise (red), blue being the opposite of red. Wide range of applications: Our cartridge replacement ceramic is suitable for bathroom and kitchen faucets, as well as cold and hot water faucets. High-quality materials: Our universal ceramic cartridges are made of high-quality brass and ceramic, with thickened threads, stable performance, sturdy and durable, high temperature resistance. Package information: You will receive 2 ceramic disc faucet heads (blue and red), diameter 22.8 mm, height 52.5 mm, 20 teeth on keyways, also drilled and threaded, suitable for bathroom or kitchen faucets. Product description The