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. This toilet gasket kit includes a high quality sponge rubber gasket, brass bolts, metal washers, plastic washers and metal nuts, for a complete restoration and leak elimination.Fits most close coupled toilets,Universal fit for both round and hex shaped flush valve nuts,All bolts are made from solid brass and all gaskets are made from high quality rubber