This KOHLER® Cimarron toilet tank features innovative AquaPiston® technology, a patented flush engine that delivers a fast, powerful, and virtually plug-free flush. A 1.28-gallon flush provides significant water savings of up to 16,500 gallons per year, compared to a 3.5-gallon toilet, without sacrificing performance. Pair this toilet tank with a Cimarron toilet bowl for a beautiful, sleek two-piece toilet. Kohler® Toilet Tank, Series: 31615, Cimarron® Collection, 1.28 gpf Gallons per Flush, Left Hand Trip Lever Flush Handle, 14-3/4 in Height, 18-5/8 in Width, Vitreous China, Black