Conjure Swivel/Tilt Task Chair offers lumbar support and built-in ratchet back for easy back-height adjustment. Back is upholstered in breathable mesh for cradling comfort. Ergonomically designed mid-back is perfect for the natural curvature of a person's back. Included arms with polyurethane pads adjust in height and width to suit your needs. Other functions include pneumatic seat-height adjustment and 360-degree swivel. Reinforced nylon base is equipped with nylon casters for easy mobility.