This kit comes complete with a flush valve, flapper, chain, locknut, washer, sponge rubber tank-to-bowl gasket, and three sets of brass tank-to-bowl bolts. This set fits all conventional 2-piece toilets with 3” flush valves. The adjustable height overflow tube adjusts from 7” to 10 3/8”, and the water-saving hard plastic 3” flapper with silicone seal can adjust to match flow rates of most toilets. The 5/16” x 3” bolt sets include all washers, nuts, and gaskets for your convenience.