Plastic frame: gray; fabric: high quality imported net cloth; armrest: PU armrest; chassis: independent research and development of aluminum alloy linear control polishing; barometer: Korean KGS brand, three grade 100mm stroke; chair foot: HM9901 aluminum alloy polishing; pulley: 65mmPU. seat cushion is the exclusive first full net environmental cushion. (fixed comfort pad or mobile comfort) Cushions can be selected.