This Cimarron® ContinuousClean® ST Toilet Tank features an automatic dispensing system that delivers a consistent amount of Toilet Bowl cleaner with every flush to keep your bowl cleaner between flushes. Simply place a cleaning tablet in the tank compartment, set the desired amount with the adjustment dial and the system does all the work. This water-efficient Toilet Tank also utilizes innovative AquaPiston® technology, a patented flush engine that delivers a fast, powerful and virtually plug-free flush. Kohler® Toilet Tank, Modern, Series: 31618, Cimarron® Collection, 1.28 gpf Gallons per Flush, Left Hand Polished Chrome Trip Lever Flush Handle, Bowl Mounting, 12.45 in Height, 18.63 in Width, 8-1/4 in Depth, Ceramic, Biscuit