Do it Best Tank-To-Bowl 3 bolt kit with double thick sponge rubber gasket. Fits most close-coupled toilets. For assembling toilet tank to toilet bowl. 5/16″ x 3″ brass tank bolts, 6 cloth reinforced rubber washers, 6 heavy round washers, and 6 brass hex nuts. Double thick tank to bowl sponge rubber gasket. Carded.