The Genuine TOTO 3 Inch Flapper by Korky is fully adjustable to fit all 3 inch TOTO toilet models. It is made with the longest lasting material on the market. The adjustable flapper has 8 settings to ensure it fits all TOTO models. Replaces the following TOTO(TM) flappers: THU138S, THU175S, THU331S, THU140S, THU299S, THU253S, THU277S, THU347S, THU275S, THU332S, and THU369S. Made of flexible rubber for a tight seal and easy to install, the 2023 includes: (1) Adjustable 3″ Flapper and (1) Stainless Steel Chain.