The Fluidmaster 400ARHRFCS PerforMAX Toilet Fill Valve, Flapper and Connector Repair Kit is designed to offer a high performance upgrade your toilets performance, while solving most common toilet problems. The included PerforMAX Fill Valve is a quiet yet powerful fill valve, offering 2X greater refill rates, a water-saving roller clamp and EZ-twist adjustability. Solve common problems like slow fill, running toilets, or faulty connectors. This toilet repair kit targets common leak points like the toilet connector, with a 12" length CLICK SEAL connector. Minimize cross threading and stripping, with no tools requires, simply twist and the audible "click" lets you know it is sealed. Size adaptors are included to ensure a fit on most common water supply lines. Built to last the durable PerforMAX 2" toilet flapper, saves money with an adjustable water lever dial, a solid frame, and chlorine and hard water resistant material build. This universal design works with all 2" flush valve toilets including Kohler, Toto and American Standard and more. Best for 1.28 & 1.6 GPF toilets, works on older valves as well.