Give your customers a long lasting flapper seal with Fluidmaster’s PRO Series Flappers. Only Fluidmaster has toilet flappers with built-in Microban protection that actively inhibits bacteria growth that contribute to flapper breakdown. The PRO54 flapper is chlorine** and hard water resistant. The flexible design allows it to fit most 2” flush valves with or without mounting ears. This flapper is best suited for 3.5+ gallons per flush toilets.