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Chong Qing Antai Spring Industries Corp. specializes in manufacturing top quality of engine valve springs, compression springs, extension springs, precise extension springs, precise torsion springs, spiral springs and waved springs for industries including motorcycle, automobile, mechanical / engineering, appliance and instrument, etc. with diameter ranging from 0.2 mm to 8.0 mm. All aspects of our manufacturing process are controlled by a complete and integrated quality assurance system. To achieve the highest quality assurance, with certificate number IMS-C1769, Antai is registered to ISO9001 certification as of 2003. Our Automobile and Back Damping springs are also accredited by Chong Qing Quality and Inspection Office as of July of 2002.