The "Dual Flush Superflow" is a flushing-system set of loose parts from the Designer Collection. Its main piece is a tall white cylindrical valve with an open slotted upper cage and a round black-and-chrome push button on top, standing on a base fitted with a dark seal ring. Alongside it come a white and translucent valve with a small cup on an angled arm, set on a clear plastic base, and two brass bolts fitted with black washers.