Install this Fluidmaster tank flapper with chain in your toilet tank to prevent a continuous run of water. Rubber gives the flapper a durable construction and a sturdy frame that holds up to use in the tank. As a flexible material, rubber remains structurally stable, so it doesn't break or crack. The included toilet tank chain remains free of kinks while in use. Resistance to chlorine and harsh chemicals ensures the flapper doesn't breakdown or decay, which makes it suitable for toilet tanks. The tank flapper measures 2 1/2 in dia. and works with a 2-in flush valve. It has a universal design to fit properly inside most tanks. Save time with the easy to install design, which is ideal for DIY projects. Each package contains two flappers. A 5-year warranty covers this flapper and chain.