Description                                   K4346, Kohler Class Five Flush Valve Upgrade by NuFlush.                                                                     4-inch flush valve, Replacement for the Kohler Class Five Toilet Canister For two-piece toilets with a larger flush hole 9.25 inches tall flush valve with adjustable water-weight, hardbody flapper Quiet and fast fill valve made of high-impact ABS material Allows more water to flush out of tank than the Kohler competitor Upgrade your flush valve to increase the flushing power of your toilet Just replace the valve, not the whole toilet Installation parts included: nylon bolts, rubber gasket Easy to install Fits Tank # 4632 among many others Durable long-lasting design Who does it better- Video