1100 Series Deluxe Fan-Back Tri-Brace Folding Chair, Supports Up to 500 lb, Blue Seat, Blue Back, Gray Base, 4/Carton Three U-shaped double riveted cross braces. Features 18-gauge 0.88" round tubular frame. Double hinges for added stability and durability. Unique full size double contoured high fan back and waterfall seat. Color coordinated polypropylene glides. Powder-coated frame. Tested by Bureau Veritas to support 500 lbs static load capacity. Our Price Buys you: 4