Olson Stacker Chairs feature a sturdy ⅛" thick polymer seat and back shell, 7/16" chrome-plated steel frame and chrome sled base. Weight capacity is 300 lb. Stack up to 12 high or 40 on a HON Cart for Stack Chairs. Convenient grip in back makes it easy to transport. 17-½" wide x 16-14" back has lumbar support. Seat dimensions are 17-¾" wide x 18-¼" deep. Seat is 17-¾" high from the floor and offers a usable depth of 17". Each chair weighs 12.5 lb. and meets or exceeds applicable ANSI/BIFMA standards.