Fluidmaster 507A 2-Inch Universal Toilet Flush Valve And Flapper Replacement Universal design fits most 2 flush valve tanks Easy-to-Install Repairs common tank to bowl leak problems Durable build, featuring corrosive resistant materials Built in antimicrobials fight bacteria for long lasting protection Includes 501 Universal Flapper with solid frame for best seal Best for toilets that use 3.5+ gallons per flush 5 year warranty