Cover material: fabric / polyester mesh fabric, color: grey / black. Mechanism and adjustments: synchronic mechanism, adjustable tilt tension and tilt lock control, pneumatic seat height adjustment. Arm rests: material: plastic, adjustable height and sw ivel angle. Base: nylon, color: black, R32,5cm. Castors: auto brake rubber castors, pin: 11mm. Dimensions: height 120-130cm, seat height 47-57cm, seat depth 50cm, seat w idth 43cm. Additional information: max w eight capacity 120kg.