auto timing sprocket 1.ISO9001:2000 Quality system 2.OEM service,ANSI,DIN standard 3.exported to Europe,Middle East,U.S etc ... auto timing sprocket :Features:1)Material:C45 steel, Cast Iron2 ... the timing sprocket, timing gear,timing chain kit and other auto engine parts. 2.OEM service,the products have passed ISO9001 ...