... .ROHS standard 3.Spring Quality:ISO90001&ISO14001 Auto brake spring accessory Spec: wire dia. Range: 0.08mm -- 3.6mm The size ... ,nickle plating,chrome plating,zinc plating,etc4.Quality:ISO90001&ISO14001quality system control5.stronger elasticity, resistant of high low temperature,long service ... help you ,pls let me know,tks ! Auto brake spring accessory