Korky Combo Pack For TOTO Toilets - (1) Korky 528GT Universal Fill Valve for Toto Toilets and (1) Korky 2021BP Toto G-Max Flapper Higher refill ratio for optimum performance in TOTO toilets Easy to install & adjust...No tools required! Authorized replacement flapper for TOTO G-Max toilets 3-inch sealing surface for larger TOTO flush valve seats Get Both Parts - Great Value Pack