The Zenergy Swivel Ball Chair is playful in form & design. This upholstered 17.5" exercise ball chair invites active seating & may help support enhanced focus & performance. The base swivels 360 degrees with active, user-controlled movement for a more active & healthy workday. These ball chairs make for a great alternative desk chair or for use in meeting areas, gathering spaces, collaboration areas, the home or anywhere else a chair is needed. The unique design may help to support better posture & balance. Its rubber molded base ensures that the chair keeps a steady grip & does not slip during use for a safe & steady alternative to a regular exercise ball. Air pump included. Designed by Thomas Walser. Recommended Application Area(s): General Office & Task; Guest / Reception & Lounge; Specialty; Seat Color: Orange; Color Family: Orange; Arms Included: No.