MODEL:ZS-CH"6211 MB CHAIR:1PA NYLON BACK +3DTHICK MESH WITH IUMBAR SUPPORT 2.ADJUSTEBLE ARMREST WITH PU COVER 3.ADJUSTEBLE MESH 4.60#MOLDED FOAM 5.3 POSITION LOCKING MECHANISM 6.CLASS 3 GAS LIFT WITH SGS APPROVED 7.#350 HIGH -END AND CHROMED ALUMINIUM ALLOY BASE 8.CASTOR #60 BLACK PU WHEELS 9.CLOR BLACK ,MESH &FABRIC SEAT. Color Black