ERGONOMIC ADJUSTABLE OFFICE CHAIR: Ultimate ergonomic black office chair with nylon frame, nylon armrests, nylon base with powder coated castors, iron gas lift, iron mechanism, and Korean mesh HIGH-BACK AND HEADREST: High-back with adjustable headrest offering you an extra comfortable experience during long periods of sitting LUMBAR SUPPORT AND ARMRESTS: Powder-coated height adjustable armrests, and supportive and adjustable back lumbar that will keep your body upright LOCKABLE: Synchro-tilt, any position locking mechanism lowering the pressure of sedentary HASSLE-FREE: Includes a limited 1-year, hassle-free manufacturer’s…