Strengthen your back and improve your posture with the ergonomic J Fit Balance Ball Chair, which combines the core strengthening benefits of a 20-inch stability ball and the convenience of a rolling base. The chair rolls on casters for easy movement around your desk, and it can be used with or without the back support. It comes with gray balance ball, gray chair frame, and an air pump. Assembly required. Overall dimensions are 22 x 22 x 31 inches (WxLxH).

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