Applicable for various models: This toilet tank flapper is compatible with most standard flush valves and toilet models, including 20-900, 20-902, 20-904, 20-910, 20-912, 21-018, 21-011, 28-180, 28-183, 28-530, 28-535, 28-98, 28-990, 28-992, 28-994, 28-995, and 28-970. It is also suitable for tank models 28-890/2/5 with classic flappers. Please note that not all model variants of the 28-890/2/5 use the same flapperWater-saving solution: Fix your toilet easily without the need for a plumber. Our toilet stopper flapper eliminates issues such as hissing, leaking, running toilet, double flush, and worn toilet flapper. It also helps save water per flush by preventing leaksConvenient package: The package includes multiple toilet flush valves for standard single flush toilets. With these replacements, you can easily fix your leaking toilet and ensure efficient flushingEasy installation: No tools required. Simply loosen the clips of the worn flapper and attach our toilet flapper replacement kit in its place. Then, attach the chain to complete the installation processReliable material: Made of soft silicone, the universal toilet flapper replacement is equipped with a stainless steel chain, ensuring durability and resistance to rust and deformation. It provides a tight seal and long-lasting performance