PlumbCraft by Waxman Toilet Flapper Replacement - Fits 3-inch Flush Valves EFFICIENT - This toilet flapper stops water inside the toilet tank from leaking down the drain with a strong, steadfast seal. DURABLE - Made of engineered PVC material which resists corrosion from chlorinated water. TRUSTED - PlumbCraft has been trusted by professional plumbers and DIY practitioners alike for more than 70 years. VERSATILE - This toilet flapper replacement fits 3-inch valves on most 1.6-gallon toilets. SIMPLE INSTALLATION - Just follow the instructions to install, for DIY plumbing made easy.