TOTO SS204#51 Contemporary SoftClose Oval Toilet Seat, Ebony SoftClose action reduces injury and eliminates "Toilet Seat Slam" Concealed hinge design Solid High-Impact, High Gloss Polypropylene Resistant to chemicals and cleaning agents Length 18-1/2-Inch, Width 14-1/4-Inch, Height 3-1/8-Inch