The KOHLER Highline toilet tank features innovative Revolution 360 technology, an advanced flushing system that uses a powerful swirling motion to thoroughly rinse the bowl. This toilet tank also utilizes innovative AquaPiston® technology, a patented flush engine that delivers a fast, powerful, and virtually plug-free flush. Pair with the recommended bowls for a complete Highline toilet. Kohler®, 44468-0, Tank, Transitional, Highline Collection, 1.6 gpf Gallons per Flush, Left-hand Trip Lever Flush Handle, 12 in Rough-In, Bowl Mounting, 13-15/16 in Height, 18 in Width, 8-1/2 in Depth, White