Our reproduction of the Nelson bench is constructed from premium grade Oak either stained black with a clear lacquer finish or left natural with a clear lacquer finish. The seat frame has mortise and tenon joints for maximum strength. The legs are hardwood and only come in black finish. There are 4 adjustable glides on the bottom of the frame. The size and geometry of our bench is true to the George Nelson original design: http://bit.ly/1za686F