Stool with air cushion seat, vinyl covering, blue. Supplied = flat pack. Seat height = 520 - 710 mm. Seat diameter = 330 mm. Seat material = vinyl. Seat colour = blue. Type of height adjustment = gas spring. Frame design = with castors. Frame material = aluminium. Frame colour = aluminium silver. Foot plate diameter = 500 mm. Product type = office stools. Integrated air cushion ensures a dynamic posture. Dynamic posture to strengthen the back muscles. Large seat adjustment range from 510 - 710 mm. The PILATES AIR SEAT features an air cushion that can move in all directions. This produces the same effect that a Pilates ball has, which encourages the body to concentrate on sitting - and in turn works out and strengthens the lumbar area and back muscles. Air cushion seat with vinyl covering, seat 330 mm. Gas lift height adjustment 520 - 710 mm with ring release under the seat. Sturdy aluminium five star base, 500 mm. Five smooth running castors, 65 mm, two with wheel stops. Supplied flat