Korky Combo Pack - (1) Korky 528MP MaxPerformance Fill Valve and (1) Korky 2001BP Premium Universal Flapper The most universal replacement fill valve Designed for optimum performance in TOTO, Kohler and American Standard toilets Universal design fits both brass and plastic flush valves. Made of Chlorazone to resist chlorine and other chemicals in the water. Get Both Parts - Great Value Pack