Elongated one-piece Skirted Design toilet, easier to maintain versus a two-piece toilet 1.28 gallons per flush TORNADO FLUSH system with a powerful centrifugal rinse TOTO’s extraordinarily smooth CEFIONTECT glaze minimizes waste from sticking to porous, ceramic surfaces. TOTO WASHLET+ upgrade compatibility: designed to work exclusively with a T40 WASHLET+ bidet seat for seamless integration Auto Flush compataible