This high-efficiency toilet tank combines water conservation with the versatile style of the Cimarron® collection. A 1.28 gal flush provides significant water savings of up to 16,500 gal per year, compared to a 3.5 gal toilet, without sacrificing performance. This tank features innovative AquaPiston technology, a patented flush engine that delivers a fast, powerful, and virtually plug-free flush. Pair this tank with the K-5309 bowl for a complete Cimarron® skirted toilet. Kohler®, 4369-0, Cimarron® Toilet Tank, Gravity Flush, Cimarron® Collection, 1.28 gpf Gallons per Flush, Left Hand Lever Flush Handle, 14 in Height, 17-5/8 in Width, 8 in Depth, Vitreous China, White