The Large 3"Tank to Bowl Gasket 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 tank tobowlgasketfitsmost3"two-piecetoiletsincluding,butnotlimitedto:American Standard®Cadet®3(4019,4021),Champion®(4260,4272,4281),Champion®4(4077,4266,4272,4281),AquaSource®(AT1201,AT1203),Crane®SureFlush®(31242),Eljer® Diplomat®(4019,4021),Stratus®(4007),Titan®(141-0777),Titan4®(4272),Ferguson®ProFlo 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),EcoDrake®(743E),Tuscany®Sereno®(11-105).Please note: tank to bowl gasketis not compatible with Kohler® toilets