Fluidmaster 2" Flush Valve Kit - PRO57KThis flush valve also features a PRO55 flapper which can be adjusted for optimal water volume. The PRO57K includes solid brass bolts, washers, nuts, and a tank to bowl gasket to give you everything you need for a successful installation. Includes flush valve, flapper, and tank to bowl hardware and gasket Fits most 2 tanks Adjustable float controls tank water level for optimal flushes Saves water by stopping leaks at the drain Chlorine resistant