The TOTO Dual Button Push Plate for DuoFit In-Wall Tank System allows you to control the water volume of the flush with a simple touch of a button. The rectangular push plate has a sleek and modern design that coordinates seamlessly with the wall hung toilet system. The button works with TOTO DuoFit WT171M, WT172M, and WT173M in-wall tank systems. Available in matte white or matte silver finish options.