Mid-Back Mesh Chair features a multi-task control that adjusts seat and back angles with a single lever (infinite locking within a fixed range). Dual-clutch posture control adjusts seat and back angles independently with two levers. Other functions include pneumatic seat-height adjustment, 360-degree swivel, posture mechanism lock to adjust back independently, tilt, tilt tension and tilt lock. Black, five-star nylon base is equipped with smooth-rolling casters for easy mobility. Weight capacity is 250 lb. Mid-back chair with fixed arms meets or exceeds BIFMA standards.