Korky Kohler Class 5 Toilet Flapper is designed to provide a reliable and long-lasting solution for your Kohler toilet. This large 3-1/4" flapper fits rectangular, black flush valves and is compatible with several Kohler two-piece models including Bancroft, Cimarron, Devonshire, and Memoirs. Crafted from exclusive red rubber, it resists chlorine, bacteria, city water treatment, hard water, and well water, ensuring durability and a tight seal. Easy to install and made from flexible rubber, this flapper is not compatible with one-piece toilets or 2" flush valves, making it a for specific Kohler models needing a dependable . Model Number: 3010BP