The Korky Ultra-High-Performance Flapper is the most universal 2-inch toilet repair flapper available. The flapper adjusts to match the original toilet settings and eliminates water waste by decreasing the amount of water flushed. Ideal for all standard 2-inch toilets Korky flappers are made from our exclusive longest-lasting rubber formulation. Korky toilet repair flappers resist bacteria city water treatment hard water and well water. Recommended by the Clorox helpline the adjustable flapper has multiple settings to ensure it fits popular 2-inch toilet models: American Standard Cadet (4029 4078 4083 4053 4650) Monarch (4003) Mainstream (4061) Evolution 2 Flo wise (4061) Kohler Well worth (K-4620) well worth (K-4519) and TOTO (706). Made of flexible rubber for a tight seal and easy to install the 100 toilet repair flapper includes (1) Flapper and (1) Stainless-Steel Chain.