The Korky 3 inch Universal Toilet Tank Flapper is adjustable to match your original toilet's performance. It has a universal design and will fit oversized 3 inch flush valves found in newer 1.6 and 1.28 gpf toilets since the year 2005. The exclusive longest lasting red rubber resists chlorine, bacteria, city water treatment, hard water, and well water. The adjustable flapper has multiple settings to ensure it fits popular 3 inch toilet models including: Kohler, TOTO, American Standard, Gerber and Mansfield. Made of flexible rubber for a tight seal and easy to install, the 3060 includes: (1) Adjustable 3 inch Flapper and (1) Stainless Steel Chain. The 3060 flapper fits the following toilets: American Standard: Actifresh (4191A), Cadet 3 (4021), Cadet 3 Flowise HET (2568, 4019, 4021, 4021N), Clean (4000), Edgemere (4159A), Titan Elite (4117A). Aquasource: blue flapper (98923), white flapper (98923) and 810485. Crane: SureFlush (31242). Delta: Corrente (RP71179), Prelude (RP71192), Riosa (RP71191), Riosa Select (RP84502). Eljer: Diplomat (4021), Titan (141-0777). Ferguson: PROFLO HET (PF9400) Gerber: Avalanche (28-890), Avalanche HE (28-890). Glacier Bay: N2428T, N2428RB, TQRS1NP4P1, 173-239, 331-725T, 1002-109-308/N2442T. Jacuzzi: Era (BK37), Espree (EZ36), Lyndsay (SW08959, SW08969, SW09959), Maxima (EZ37), Perfecta (EZ33), Prestige (GV80). Kohler: Cimarron (K-4634). Mansfield: Barrett (106), Brentwood (3147), Denali (3916), Maverick (102), Maverick 1.28 (112), Protector (1386), Summit ADA (386), Waverty 1.28 (3195). Pegasus: Colonnade (152-143), Westminster (164-146). Project Source. TOTO: Drake (ST743), EcoDrake (743E), Supreme (MS863113, MS864114), Ultimate (MS853113, MS854114). Tuscany: Erie (Z58R16S19306), Huron (Z59E16S19306).