Kohler 1237538 San Souci Flapper Valve Assembly Upgrade by NuFlush (Red Flapper)

‌3.07-inch or 78mm flush valve that is a replacement for the Kohler 1237538 Canister For One Piece Models of the Kohler 1237538 11-inches tall flush valve (can be cut down to size) Upgrade your flush valve to increase the flushing power of your toilet