Plastic frame: gray; fabric: high quality imported net cloth; armrest: baking ash lacquer inner tube, PU armrest; chassis: independent research and development of aluminum alloy linear control polishing; waist Leaning: TPR+ nylon; barometer: electroplating, Korean KGS brand, three class 100mm stroke; chair foot: JW aluminum alloy polishing; pulley: 60mmPU intermediate electroplating. (mobile comfort pad can be used. Optional)