Model number:GF-240 Size:Standard Chair Cover Material: PVC Leather Arm Type : Movable Arms Mechanism Type : Multi-functional Tilt Gas Lift: 80mm Base :R350mm PP Base Casters : 60mm Caster/PU Frame: Metal Foam Type: High Density New Foam Adjustable Back Angle :135° Adjustable Lumbar Cushion :Yes Adjustable Headrest :Yes