Good Sealing: The bottom of our Ceramic Disc Head is completely replaced with rubber O-rings with threaded rings, which can prevent your faucet from leaking and save you having to replace the faucet again. Easy to Install: The ceramic cassette faucets feature blue and red O-rings on the bottom for easy differentiation. Turn the valve clockwise (blue) and counterclockwise (red), with blue being the opposite of red. Wide Range Of Applications: Our Cartridges Replacement Ceramics are suitable for bathroom, kitchen and also cold and hot water taps. High Quality Materials: Our Universal Ceramic Cartridges are made of high quality brass and ceramic, with thickened wires, stable performance, sturdy and durable, high temperature resistance. Package Information: You will receive 2 Ceramic Disc Faucet Heads (blue and red), diameter 22.8mm , height 52.5 mm, 20 teeth on splines, also drilled and threaded, suitable for bathroom or kitchen taps. Product description The leaky tap n is not properly