Optimize your toilet’s flush cycle using this Master Plumber rubber flapper. Crafted from flexible materials, the Crane #57 black and white flapper easily conforms to uneven surfaces to provide a watertight seal. Its tough construction prevents corrosion by chemicals such as chlorine and detergents to support use in treated water applications. Manufactured using rot-resistant materials, the 3/4-in H x 4-in D rubber flap for toilets is durable. It has a white styrofoam center that helps the flapper stay open longer to allow more water for improved flush performance. Crafted in an adjustable layout, the toilet rubber flapper enables fine tuning the amount of water dispensed in each flush cycle. It comes with an old-style lift chain and hook for reliable performance. Made from rust-resistant components, this metal chain offers increased longevity. | Master Plumber Master Plumber Toilet Flapper – Classic – Rubber – Black/White – 3/4-in x 4-in 212 Master Plumber | Toilet Flapper – Classic – Rubber – Black/white – 3/4-In X 4-In .