... production 2.ROHS standard 3.Spring Quality:ISO90001&ISO14001 Auto brake spring accessory Spec: wire dia. Range: 0 ... ,chrome plating,zinc plating,etc4.Quality:ISO90001&ISO14001quality system control5.stronger elasticity, resistant of high low temperature ... printers, office appliance, precision appliance, various modes of transport, auto parts, sports apparatus, switch, socket, water heater, calculator, ...