The Toto ST753E#51 is an ebony (onyx black) toilet tank (with cover) from the Eco Dartmouth Collection. It is made of Vitreous china, a coating that helps in keeping the tank durable and elegantly glossy. The flush type which is a 1.28 GPF gravity flushing system is very easy to use and it quickly and smoothly clears waste away while saving 20 percent of the water use. This Dartmouth toilet tank is easily installed and maintained in both household and commercial bathroom applications. This stylish, modern high-performance toilet tank is designed to help achieve a healthy hygienic atmosphere in either your household or office and it’s now available through PlumbersStock.com. The E-Max system included with this toilet tank is designed to give a powerful and effective flush by incorporating a 2 1/8-inch (diameter) trap-way and an extra-large siphon Jet. This Toto ST753E#51 toilet tank is the answer for a hassle-free, comfortable lifestyle that expresses the true passion for design, craftsmanship, artistry, and innovation. The combination of technology and reliability is sure to please and meet all your quality and comfort expectations.