Seat is 5/16″ (18mm) thick, one piece, solid phenolic, semi-gloss laminate white colored top and bottom and shall have black edges. Frame, support legs, flanges and bracket are type 304 satin finished stainless steel. Guide bracket shall control seat lowering into operating position. Seat measures 20″ (508mm) wide and projects 14 1/2″ (368mm) from wall.