Two-piece design;Elongated bowl offers added room and comfort;Comfort Height feature offers chair-height seating that makes sitting down and standing up easier for most adults;1.28 gpf (4.8 lpf);Insuliner tank liner minimizes condensation on the tank;Left-hand Polished Chrome trip lever;2" (51 mm) fully glazed trapway;Revolution 360 flushing technology generates a forceful swirling motion to keep the bowl clean longer;Sanitary guard where bowl and tank meet for ease of cleaning;Weighs less than previous Highline models;Combination consists of toilet bowl and tank;AquaPiston canister optimizes the flow out of the tank, harnessing gravity and the natural, powerful reducing cascade of water to increase the power and effectiveness of the flush;Easy-to-flush canister design requires less force to actuate than a 3" (76 mm) flapper, and has 90% less exposed seal material which resists conditions that cause wear, tear, shrinkage and swelling