Flush valve repair kit for toilet

Brand new flush valve repair kit for toilet. Brand is called Korky. The packaging is a little bit damaged but it has never been opened. It was the wrong size for my toilet. This is intended to stop running toilets. Fits 2 inch flush valves. Fixes leaks at tank drain. Repairs corrosion or deposits on flush valve seat. Easy instructions included. The product indicates that it should last five years within purchase.