Model number: T852-1 Size:Standard Chair Cover Material: Mesh Fabric Arm Type : Adjustable 3D Mechanism Type :Multi-functional tilt with 3 level locking Gas Lift: 80mm TUV approved Base :R345mm Aluminum alloy Base Casters : 60mm Caster/PU Frame: Grey Nylon Foam Type: Molded foam Adjustable Back Angle :135° Adjustable Headrest :Yes