Based on customer comments sent in nearly every week, it appears a quiet revolution is slowly taking over the conventional office chair set-up. Our patented BalanceBall Chair greatly alleviates the aching back/legs/arms syndrome that come from working at a desk for hours. It employs the same BalanceBall used in your workout routine, an adjustable support bar, easy-glide casters, an air pump and a desktop guide to get you moving. Designed for people 5' to 5'11" tall. Black. Some assembly required. 21"W x 31"H x 22"D. 13 lbs. A delivery surcharge of an additional $5 will be applied to the order for standard delivery. Gift wrap not available.