KOHLER 3989-RA-0 Highline Comfort Height Two-Piece Elongated Dual-Flush Toilet with Class Five Flush Technology and Right-Hand Trip Lever, White Elongated bowl offers added room and comfort Comfort height feature offers a chair-height seat that makes sitting down and standing up easier for most adults Right-hand nested trip lever offers a choice of 1.1 or 1.6 gallons per flush (gpf) Standard 12-inch rough-in Watersense toilets meet strict epa flushing guidelines, including using at least 20 percent less water than 1.6-Gallon toilets