Olson Stacker Chairs feature a sturdy 1/8" thick polymer seat and back shell, 7/16" chrome-plated steel rod frame and chrome sled base. Stack up to 12 high or 40 on a HON Cart for Stack Chairs. Convenient grip in back makes it easy to transport. 17-1/2" wide x 16-1/4" back has lumbar support. Seat dimensions are 17-3/4" wide x 18-1/4" deep. Seat is 17-3/4" high from the floor and offers a usable depth of 17". Weight capacity is 300 lb. Each chair weighs 12.5 lb. and meets or exceeds applicable ANSI/BIFMA standards.