Fluidmaster® Tank-To-Bowl Gasket, For Use With: Both Round and Hex-Shaped Flush Valve Nut, Sponge Rubber

This gasket seals the toilet tank to the bowl. Fluidmaster bolts, screws and gaskets are what you need to install or repair a rocking toilet. All bolts are made from solid brass, and all gaskets are made from high-quality rubber.