FM520A01 FLUIDMASTER TOP PUSH FLUSH VALVE BUTTON 38mm , OD : 55mmFeatures:Usage: Repair leaks between tank and bowl.Flapper features built-in Microban technologySuitable for all 2" toilets.Compatible with water closets that support single flushes.Solid frame flapper for a secure seal.Specification : Code :520A01Brand : FluidmasterDescription : Top Push F/V ,Button 38mm , OD : 55mm