Chairs fold easily and stack 36 high; fit through 80" doors. Frames are electrically seam welded 18-gauge 7/8" tubular steel. Cross supports are 5/8" 18 gauge steel tubing. Seats and backs are Polypropylene plastic. Leg glides are replaceable non-marring polyethylene. 18-3/4" W x 29-3/4" H x 20-3/4" D (47 x 74 x 52cm). Folded: 38" x 3" (97 x 7.5cm). Seat height: 16-3/4" H (42cm). 5-year warranty. CHAIRS ARE MADE TO ORDER AND CANNOT BE RETURNED The 800 Series folding chair offers the perfect solution for both indoor and outdoor seating events such as meetings, graduations and receptions. This lightweight institutional-grade chair was made to provide you with the strengths of metal and all the benefits of plastic. The powder-coated 18-gauge tubular steel frame features two double-riveted U-braces - one in front and one in back - to securely support the double-hinged legs. The large seat and backrest are made of comfortable contoured color-impregnated plastic to prevent fading and rusting. Color-coordinated V-tip stability plugs provide added reinforcement at the frame's junction and matching replaceable glides prevent floor damage. These stack horizontally up to 36 chairs high. The 800 Series meets MAS Certified Green and ANSI/BIFMA standards.