With its clean, simple design and ultra high-efficient performance, this Highline water-conserving toilet combines both style and function. A 1.0-gallon flush reduces water use by more than 35 percent over 1.6-gallon toilets, offering a water savings of more than 4,500 gallons of water per toilet, per year. The elongated seat and chair-like height ensure comfortable use. Two-piece toilet. 1.0 gallon per flush (gpf). Elongated bowl offers added room and comfort. Comfort Height¬Æ feature offers chair-height seating that makes sitting down and standing up easier for most adults. Standard left-hand Polished Chrome trip lever included. Combination consists of the K-5308 tank and the K-5297 bowl. Standard 12-inch rough-in.