Fluidmaster 2 Bolt & Gasket Tank-To-Bowl Kit. It includes 2 each 5/16"x3" brass bolts, red sponge rubber gasket, 4 brass washers, 4 rubber washers & 2 each hex & wing nuts. Gasket fits over both round & hex shaped flush valve nuts.
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov