Clever Black mesh Highback operators chair including headrest, BIFMA Mesh chair, with 3D Headrest, 3D Armsrest, Back of chair has Lifting Function, 5 levels of locking and can be adjusted to fit spine of different people, BIFMA - 3 Speed Seat slide, Moulded Foam, 3D adjustable arms with 5 Position, Synchro Mechanism, with 5* Aluminium Castor Base