Replacement for Sloan C-100500-K Flushmate Flush Valve Cartridge Assembly and Removal Wrench Make installation fast and easy - wrench included! Made with heavy-duty materials in the USA Replacement for Sloan Flushmate C-100500-K or Gerber 99-403 Cartridge and Sloan ST100500 Flushmate Cartridge Wrench Fits Sloan series 500, 501, 501A, 501B, 503 and 504 tank systems Flush valve cartridge assembly includes duckbill replacement valve, filter screen disc and instructions