For 6 bucks you are only getting the rubber flapper, not the complete foot valve!! These are replacement flappers for Keene foot valves with a 2 1/2" inlet. Mostly used on 3 and 4" dredges with a P-180 pump. Very common. If you are not sure this will work, ask me. Beats buying a new foot valve. By the way, be sure to check out my new heavy duty replacement 'FAT' bucket handles also listed on ebay. Makes carrying your material a heck of a lot easier and more comfortable!!