Sold as 1 Each. Black Vinyl fabric. Use as alternative desk chair in meeting areas or gathering spaces. Use as alternative desk chair, in meeting areas or gathering spaces. Designed by Thomas Walser. Black Vinyl Seat. Pump included. May help support better posture and balance. Meets or exceeds ANSI/BIFMA standards. Full assembly required. Manufacturer's Limited Lifetime Warranty. Provides ample movement as it allows usesr to swivel and lean. Seat: 17.5'Wx17.5'Wx23'H. 360° swivel base with active, user-controlled movement. Rubber molded into base so chair does not slip.