Toto ss154-01 elongated trad softclose seat, cotton white toto’s traditional softclose seat uses the latest in innovative smart seat technology in a classic design. Constructed of solid, high-impact plastic, this unique seat is specifically designed to reduce injury, and eliminate annoying “toilet seat slam.” the seat and lid utilize a built-in softclose hinge system, which lowers the seat down to the bowl gently and quietly. the engineering of softclose incorporates toto’s high standard of quality. Top tightening mounting bolts ensure easy installation. Elongated closed front seat with lid, mounting and connection hardware included.