1.Compatibility: This 3-inch toilet flapper is designed for 3-inch toilet flush valves, ing strong compatibility. It is compatible with 3-inch flush valves from multiple brands, such as Gerber, DANCO, and others. 2.High-Quality Materials: Our toilet flapper is made of high-quality rubber, which is very soft and quickly recovers after deformation, ensuring a good seal for the flush valve. The chain is made of premium stainless steel and has undergone multiple tests to ensure the product's durability, allowing for long-term use. 3.Easy to Install: Replacing our toilet flush valve flapper requires no tools. Simply remove the old flapper from the flush valve and install our one. No need to hire a plumber, protect your wallet. 4.Water Saving: It is perfectly compatible with 3 inches flush valves. With strong sealing performance, it can easily solve the problem of water leakage in the toilet cistern caused by the flush valve, reducing water waste.