Safco Zenergy Swivel Ball Chair Black VinylDescriptionSpecificationsShipping New spin on Zenergy Ball Chair Anti burst 17 1 2 inch exercise ball covered in vinyl or mesh 360 degrees swivel base with active, user controlled movement Use as alternative desk chair, in meeting areas or gathering spaces May help support better posture and balance Provides ample movement as it allows users to swivel and lean Rubber moulded into base so chair does not slip Pump included Designed by Thomas Walser Due