The Large 3" 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. The tank to bowl gasket fits most 3" two-piece toilets including, but not limited to: American Standard® Cadet® 3 (4019, 4021), Champion® (4260, 4272, 4281), Champion® 4 (4077, 4266, 4272, 4281), AquaSource® (AT1201, AT 1203), Crane® Sure Flush® (31242), Eljer® Diplomat® (4019, 4021), Stratus® (4007), Titan® (141-0777), Titan 4® (4272), Ferguson® Pro Flo HET (PF9400), Gerber® Avalanche® (28-890, HE-28-890), Jacuzzi® Era® (BK37), Espree® (EZ36), Maxima® (EZ37), Perfecta® (EZ33, GU04959), Prestige® (GV80), Mansfield® Barrett® (106), Summit® (386), Maverick® (112), Waverly® (3195), Pegasus® Westminster (164-146), TOTO® Drake® (743S), Eco Drake® (743E), Tuscany ® Sereno® (11-105). Please note: tank to bowl gasket is not compatible with Kohler® toilets. Easy to install, the 480 includes: (1) Sponge Gasket and (1) Set of Hardware.