The KOHLER® San Souci one-piece toilet offers a sleek, contemporary design with a convenient chair-height and elongated bowl for comfortable use. This one-piece elongated toilet 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. Kohler® Toilet, 1-Piece, Series: Comfort Height®, San Souci® Collection, 1.28 gpf Flush, Compact Elongated Bowl, 16-1/2 in Rim Height, 12 in Rough-In, 2-1/8 in Trapway, Floor Mounting, AquaPiston® Flushing System, 16-7/16 in W x 25-5/16 in D x 27-1/2 in H Overall, Metal, Biscuit