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 stainless steel finish adds a clean and modern styling to any bathroom space. The button plate works with TOTO DuoFit WT171M, WT172M, WT173M or WT173MA in-wall tank systems