Runtz Swivel Ball Chair, Backless, Supports Up to 250 lb, Green VinylBrighten any space with this swivel ball chair. The swivel motion and or rocking may allow for more active fidgeting throughout the day. The 360 swivel base with active, user controlled movement; designed to help support better posture and balance. Includes rubber molded into base, so chair does not slip. Great for use in home offices, schools or waiting rooms. Pump included with ball chair. Part of the Safco Active Collection: The Safco Active