National Public Seating steel frame premium light weight plastic seat and back stacking folding chair with double brace. Our 800 series plastic folding chair was built to provide you with the strengths of a metal folding chair and the benefits of a plastic folding chair. The plastic seat and back are made of color-impregnated plastic which is molded and contoured for comfort and specially designed to enable horizontal stacking up to 36 high. By nature plastic will not fade or rust and isn"t cold to the touch like steel chairs are. Seat has a steel frame for added strength. Features a powder coated steel frame made from our strong 18 gauge round tubing and a U-shaped cross brace on the front and back- each attached to the frame by double rivets to ensure stability and support. In addition our model is designed with double hinges and V-shaped stability plugs at the tubular junction. We bring you the perfect solution for both indoor and outdoor seating events such as meetings, graduations, and receptions. Features 18-gauge 7/8" round tubular frame. Two U-shaped double riveted cross braces. Double hinges on each side for added stability and durability. Color coordinated polypropylene glides. Stacks up to 80" high (36 chairs) on DY 800 with specially designed stacking tabs. Designed for indoor or outdoor events - inverted rear leg U-brace prevents sinking into ground. The Body Builder line chair. Gray plastic seat and back, gray frame. Measures 18-3/4" width by 29-3/4" height by 20-3/4" depth. Folded measures 18-3/4" width by 38" height by 2-1/2" depth. Seat measures 15-3/4" width by 18" height by 16-1/4" depth. Back measures 18-3/4" width by 7-1/2" height. 10 Years warranty. MAS Certified Green. Products meets or exceed applicable ANSI/BIFMA standards.