Fluidmaster, Flusher Fixer Kit, Includes #502 Universal, Sealant Ring, #502 Universal Flapper, Which Is Long Lasting, Water Saving Flapper & Is Best For Use In 1.28 To 3.5 Plus Gallon Per Flush Toilets, Has A Solid Frame For Ultimate Reliability & Will Provide The Best Seal, Microban Protection Keeps The Flapper Cleaner By Fighting Flapper Breakdown Due To Bacteria On The Flapper Itself, Sealant Ring Is Easy To Install, Peel The Protective Paper Off The Sealant Ring & Then Stick Right On Top Of An Existing Flush Valve Seat, Can Fix A Deteriorated Flush Valve Seat Without Dealing With Any Messy Glue Or Removing The Tank.