Pu leather soft material new modern style, comfortable computer and office chair supportive back design air compression seat height adjustment shining black color armrest with pu leather pad gas lift: class 3 butterfly mechanism tilt tension control seat size : 19.5 ” W x 20” d back size: 20.5”W x 29”h product size: 25″ d x 25″ w x 45” – 50″ h shipping weight: 38 lbs.