With its clean, simple design and efficient performance, this KOHLER® Highline water-conserving toilet combines both style and function. An innovative 1.28-gallon flush setting provides significant water savings of up to 16,500 gallons per year, compared to an old 3.5-gallon two-piece elongated toilet, without sacrificing flushing power. This model features a unique tank liner that minimizes exterior condensation in humid environments. Kohler® Toilet, 2-Piece, Highline® Comfort Height® Collection, 1.28 gpf Flush, Elongated Bowl, 16-1/2 in Rim Height, 10 in Rough-In, 2-1/8 in Trapway, Floor Mounting, Class Five® Flushing System, 10-1/8 in W Bowl, 18 in W x 31-1/4 in D x 29-1/2 in H Overall, Vitreous China, White