Plastic frame: black; fabric: high quality imported net cloth; armrest: PU+ nylon, roasted black lacquer inner tube; chassis: independent research and development of aluminum alloy linear control polishing; barometer: electroplating, South Korea KGS brand, three grade 100mm stroke; chair foot: JW aluminum alloy polishing; pulley: 60mmPU intermediate electroplating. (mobile comfort pad selection) head Pillow height, angle and automatic elastic support adjustment; independent research and development of linear control chassis, can choose memory lock or angle locking; back pad back angle adjustment, humanized back tightness adjustment, four section height adjustment; waist close to automatic elastic support; seat height, seat depth adjustment; 4D no button handrails adjustment (high and low, front and back, back and backward, front and back, Left and right, angle)