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