Description 3.5-Inch One-Piece Toilet Flush Valve with Buoy, 2 extra seals Fits 3.5-inch flush holes. For one-piece toilets Connects with 3 locking lugs 10-inch-tall overflow tube allows you to flush more water with each flush Hardbody Flapper with Buoy Comes with 2 extra seals – 89x52x55 Flush Valve Easy Measuring Tips – Video One piece or Two piece which is right for you? Video