This chair is designed band-pitch style with a seat to back angle of 97° allowing for maximum breathing capability. The frame is 7/8", 16 gauge square tubing. The seat and back are made of durable polypropylene. Black frame, seat & back. Seat dimensions: 16 1/2" W 16 1/2" D x 17 1/2" H. Overall dimensions: 19" x 21 1/2" D x 33 1/2" H. Must be ordered in multiples of 2. Other available options include a left or right table arm in Speckled Grey laminate (some assembly required).