With its clean, simple design and ultra high-efficient performance, this KOHLER® Highline water-conserving toilet combines both style and function. A 1.0-gallon flush reduces water use by more than 35% over 1.6-gallon two-piece elongated toilets, offering a water savings of more than 4,500 gallons of water per toilet, per year. The elongated seat and chair-height ensure comfortable use. Kohler® Toilet, 2-Piece, Highline® Comfort Height® Collection, 1 gpf Flush, Elongated Bowl, 16-1/2 in Rim Height, 12 in Rough-In, 2-1/8 in Trapway, Floor Mounting, Class Five® Flushing System, 10 in W Bowl, 18 in W x 31-1/4 in D x 29-1/2 in H Overall, Vitreous China, White