ENHANCED FLUSH EFFICIENCY:Replace the old or damaged GP1059291 flush valve seal to restore the original flushing efficiency for Kohler toilet; preventing weak flushes and poor performance caused by a clogged or worn-out flush valve seal gasket for Kohler GOOD FIT: Our K-GP1059291 flush valve seal is suitable for all Kohler toilets with canister flush valves, is a perfect substitute for Kohler canister flush valve seal (red or yellow), compatible with K-4436 etc parts PREMIUM MATERIAL: Our for Kohler GP1059291 replacement seal is made of outstanding silicone materials, which are superior to rubber; designed to meet various water challenges; offers excellent and long-lasting performance; ensure reliable seal for kohler flush valve EASY INSTALLATION: No special tools required; replace the old flush valve seal for Kohler toilet in just three minutes; follow simple steps for a good fit and immediate results; K-GP1059291 outer diameter 3.3 inches, inner diameter 2.6 inches GREAT VALUE PACK: For kohler gp1059291 flush valve seal kit Available in 2, 3, or 5 Packs; offers replacements for kohler toilet flush valve gasket; ideal for keeping spares on hand for future maintenance