Global 31443NBKS110 Graham Pneumatic Ergo-Tilter Swivel/Tilt Chair, Black Sprinkle Fabric Multi-curved backrest with an impact-resistant outer shell. Single position tilt-lock with adjustable back angle offers optimum comfort. Waterfall seat edge relieves leg pressure. Height-adjustable T-arms with curved urethane arm caps. Five-legged, injection-molded spider base has casters for easy mobility.