200 Series Premium All-Steel Double Hinge Folding Chair, Supports Up to 500 lb, 17.25" Seat Height, Blue, 4/Carton Two U-shaped double riveted cross braces. Features 18-gauge 0.88" round tubular frame. Electromagnetically welded seat back. Double hinges on each side for added stability and durability. Color coordinated polypropylene glides and V-tip plugs for added stability. Powder-coated frame. Tested by Bureau Veritas to support 500 lbs static load capacity. Our Price Buys you: 4