The Karsten Dual Force toilet tank, when combined with the Karsten bowl, creates a two-piece toilet that delivers consistent, reliable power. This toilet tank will complement your bath or powder room with its attractive, contemporary style. Crafted of grade A vitreous china, it provides a durable, non-porous product with a hard, glossy finish that is easy to clean. Sterling® Toilet Tank, 2-Piece, Karsten®, Gallons per Flush: 0.8/1.6 gpf, 2 in Flush Valve, 12 in Rough-In, Bowl Mount, 29-3/4 in Height, 15 in Width, 29-1/4 in D, Vitreous China, White