National Public Seating steel frame polyfold fan back double hinge folding chair with triple brace. Our 1100 series fan back plastic folding chair was built to provide you with the strengths of a metal folding chair and the benefits and comfort of a plastic folding chair. Our comfort radius fan back provides added comfort and breathe-ability when demands call for long term use. The plastic seat and back are made of color-impregnated plastic, molded and contoured for comfortable seating and designed to enable horizontal stacking up to 26 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 2 U-shaped cross brace on the back along with one on the front- 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. Color coordinated polypropylene glides. Features unique full size double contoured high fanback and waterfall seat. The Body Builder line chairs. Black plastic seat and back, black frame. Measures 18-1/2" width by 34-1/2" height by 20-3/4" depth. Folded measures 18-1/2" width by 44" height by 2-1/4" depth. Seat measures 15-3/4" width by 17-3/4" height by 16" depth. Back measures 18-1/2" width by 13-1/2" height. 10 Years warranty. MAS Certified Green. Products meets or exceed applicable ANSI/BIFMA standards.