The Fluidmaster 555C 2" Flush Valve Repair Kit is hands down the easiest way to fix leaks from your flush valve with no messy glue or tank removal necessary. Simply peel the protective paper off the sealant ring and stick it right on top of your existing flush valve seat! This repair kit features a PerforMAX® water-saving flapper that is best for use in 1.28 – 3.5+ gallons per flush toilets. Works with 2” flush valve toilets.