The 2" Tank to Bowl Gasket is universal to fit most 2" two-piece toilet tanks. The universal sponge rubber design measures: 2-1/8" inner diameter, 3-1/2" outer diameter and 1-1/4" thick. Easy to install, the 463 includes: (1) Sponge Gasket. Please note: the 463 does not include hardware. If interested in a kit, please reference the 464 for gasket and hardware.