The 2 In. Tank to Bowl Gasket and Hardware Kit is universal to fit most 2 In. two-piece toilet tanks. The universal sponge rubber design measures: 2-1/8 In. inner diameter, 3-1/2 In. outer diameter and 1-1/4 In. thick. The included hardware is stainless steel to ensure a long, corrosion-resistant life. Easy to install, includes sponge gasket and set of hardware.