National Public Seating 50 Series All Steel Standard Folding Chair with Double Brace, 480 lbs Capacity, Char-Blue (Carton of 4) Steel folding chair for temporary seating and efficient storage when not in use 19 gauge, 7/8" tubular steel frame supports 480 lb. static weight, 300 lb. drop weight "Y-frame" structure and double-riveted front and rear leg cross braces for stability Seat has a rounded, "waterfall" front edge to help reduce pressure on the back of the knees Designated by the MAS Certified Green program as low VOC emitting furniture to help protect indoor air quality