Korky, 3", Large EasyFix Flush Valve Repair Kit, Repairs Corrosion Or Deposits On Plastic & Brass Flush Valve Seats & Corroded Flush Valve Seats Without Removing Your Toilet Tank, Engineered Materials Resist Chlorine, Bacteria, City Water Treatment, Hard Water, & Well Water, Universal Design, Fits Oversized 3" Flush Valves Found In Newer 1.6 & 1.28 GPF Toilets Since 2005, Multiple Settings, For Use With Kohler, Toto, American Standard, Gerber & Mansfield, Silicone Seals Within 15 Minutes, Making Installation Quick & Easy, Made Of Flexible Rubber For A Tight Seal, Includes: 1 Large Flapper, 1 Stainless Steel Chain, 3 Plastic Flush Valve Seats & 1 Tube Of Silicone Sealant.