Description 2.44-inch One-Piece Flush Valve Assembly with Buoy fits 2.5 inch Flush Hole Compatible Kohler, Eljer, Toto, American Standard, Crane. Hardbody with buoy For 2.5-inch 1 piece flush holes Flushes all the water in the tank Flushes more water per flush Comes with all installation hardware included Kohler 118900 explained – Video Flush Valve Easy Measuring Tips – Video One piece or Two piece which is right for you? Video