Description American Standard Evolution 2 Complete Kits – 2 Piece 2 in. Toilets Models – #2426, 2427, 2428, 2752, 2753, 2754, & 2759 / Tank #4061 2 inch Flapper Made with premium materials for enhanced durability Engineered to promote product longevity Comes with Tower Fill Valve and 2.5-inch Two Piece Flush Valve Flush Valve sits on the bottom of the toilet tank so you can flush all the water in the toilet tank.   Adjustable height Fill Valve to fit any toilet, 8.5 to 12 inches tall