1.High back mesh chair, nylon backrest. 2.Adjusted headrest, adjusted armrest, adjust back cushion. 3.Mould foam (headrest, back cushion, seat). 4.Synchro mechanism. 5.BIFMA 100CM chromed gaslift,(class 3). 6.350MM alumnium base with BIFMA nylon castors. 7.Export strong carton.