EXACT REPLACEMENT for your Kohler K-GP1059291 Canister Flush Valve Seal (red or yellow color). Made from high-quality, durable rubber. Equivalent to part K-GP1059291 / 2475620 CREATE A STRONGER FLUSH: Toilet gasket seals wear out over time and need to be replaced - replacement creates better flushing pressure and results in a quieter toilet. No one wants a loud or hard to flush toilet! WORKS ON KOHLERS WITH FLUSH VALVE: Compatible with all Kohler toilets with a canister flush valve. If you have any questions about fit, please ask a question below. Dimension: Outer diameter of 3.3" 3 MINUTE INSTALL: Installation instructions for proper use below. Installation is simpler than you'd expect, and does not require you to remove the base of the toilet. Pack of 5 for a great value!.