Marketing InformationThe Large 3" & 4" Tank to Bowl Gasket and Hardware Kit is designed to fit specific toilet models that were made after 2000. The universal sponge rubber design measures: 3" inner diameter, 4-1/4" outer diameter and 1-1/8" thick. The included hardware is stainless steel to ensure a long, corrosion-resistant life. Please note: tank to bowl gasket is not compatible with Kohler® toilets. Easy to install, the 481 includes: (1) 480 Sponge Gasket and (1) Set of Hardware.