Kohler K-3575-RA-7 Wellworth Classic 1.28 gpf Elongated Toilet with Class Five Flushing Technology and Right-Hand Trip Lever, Black Black 30"L x 19-5/8"W x 28-1/4"H Class Five flushing technology provides tremendous bulk waste flushing performance and best-in-class bowl cleanliness Two-piece toilet Canister flush valve provides smooth flushing actuation with consistent water usage, flush after flush 1.28 gpf High-efficiency toilets provide significant water savings of up to 16,500 gallons per year versus an old 3.5 gallon toilet without sacrificing performance