The TOTO Eco Promenade E-Max 1.28 GPF Toilet Tank is designed for use with the Promenade bowl. The Eco Promenade tank includes a tank to bowl gasket, tank to bowl hardware, and toilet bolt caps. The Eco Promenade tank features TOTO's E-Max flush technology, featuring a 3 wide flush valve. This reliable, highly efficient combination generates a powerful cleansing flush while only using 1.28 gallons of water. The Eco Promenade tank comes equipped with a decorative left-hand chrome trip lever. The Eco Promenade tank meets the standards for EPA WaterSense, and California, CEC and CALGreen requirements. Additional items needed for installation and use must be purchased separately: bowl, wax ring, toilet mounting bolts, water supply lines, and toilet seat. The Eco Promenade tank can be used on the following Promenade bowls: C423EFG, C423EF, C424EFG or C424EF. Eco Promenade toilet tank for use with Eco Promenade toilet bowl. E-Max 1.28 GPF flushing system, creates a powerful flush. Decorative left-hand chrome trip lever. WaterSense, CALGreen, and CEC compliant. Included parts: tank to bowl gasket, tank to bowl hardware, and toilet bolt caps. Purchased separately: Eco Promenade bowl, wax ring, toilet mounting bolts, water supply lines, and toilet seat. Compatible with the following bowls: C423EFG, C423EF, C424EFG or C424EF