KOHLER 3811-96 Santa Rosa Comfort Height Elongated 1.6 GPF Toilet with AquaPiston Flush Technology and Left-Hand Trip Lever, Biscuit One-piece toilets integrate the tank and bowl into a seamless, easy-to-clean design Comfort Height offers chair-height seating that makes sitting down and standing up easier Compact elongated bowl offers added comfort while occupying the same space as a round-front bowl AquaPiston canister allows water to flow into the bowl from all sides, creating a morepowerful & effective flush Durable canister design has 90% less exposed seal material than a 3-inch flapper, for leak-free performance