The Toto® Aquia® Dual-Max, Dual Flush 1.6 and 0.9 gpf Toilet Tank is designed for use with the Aquia® dual flush bowl. The Aquia® tank includes a tank to bowl gasket, tank to bowl hardware, and toilet bolt caps. The Aquia® tank features Toto®'s Dual-Max dual flush option, allowing you to proactively conserve water usage. The chrome center-mounted push button that sits atop the tank allows you to choose between a 0.9 gpf rinse or 1.6 gpf for tougher jobs. The Aquia® tank meets the standards for EPA WaterSense®®, and California’s CEC and CALGreen requirements. Additional items needed for installation and use must be purchased separately: toilet bowl, wax ring, toilet mounting bolts, water supply lines, and toilet seat. The Aquia® ST412M tank can be used on the following Aquia® bowls: CT412F and CT412F.10.