The Fluidmaster 5083 2 in. Hinged Toilet Flapper for KOHLER 1-Piece Toilets is specifically designed for your KOHLER toilet. Fitting KOHLER models, San Raphael (93384; cb, rev.), Rialto (3386; da, ea, fa, revs.), Rosario (3434; fb, revs.), you can find the tank model number printed on the back side of the tank. Built from high quality rubber, this toilet flapper remains both durable and flexible. While the rigid frame and included kink free chain ensure a secure seal with every flush. Built to last this 2 in. toilet flapper is constructed from corrosive resistant materials and features a 5 year warranty. Save time and money, with the Fluidmaster Hinged Flapper Replacement for KOHLER 1-Piece Toilets.