The Korky Large 3 inch EasyFix Flush Valve Repair Kit is designed to repair corrosion or deposits on plastic and brass flush valve seats. The kit includes a large 3 inch flapper, 3 plastic flush valve seats and silicone sealant to repair corroded flush valve seats without removing your toilet tank. The engineered materials in the flapper resist chlorine, bacteria, city water treatment, hard water, and well water. It has a universal design and will fit oversized 3 inch flush valves found in newer 1.6 and 1.28 gpf toilets since the year 2005. The adjustable flapper has multiple settings to ensure it fits popular 3 inch toilet models including: Kohler, TOTO, American Standard, Gerber and Mansfield. The silicone seals within 15 minutes, making installation quick and easy. Made of flexible rubber for a tight seal, the 3003BP Includes: 3060BP Large Flapper, Stainless Steel Chain, Three Plastic Flush Valve Seats and Tube of Silicone Sealant.