we make a full range of multi-leaf spring and parabolic leaf spring and Z-type leaf spring product which is used in heavy duty truck and trailers and light vehicles. All products are exported to overseas throughout over 30 countries terms of Asia, Mid-East, Euro and North-America. We can produce over 25,000 tons per year with general capacity. The raw material we use SUP7,SUP9,SUP9A,SUP11,SUP11A and 50Cr4. Controlling all of the products is a certified ISO 9001:2000 system that insures existing processes are followed and that continuous improvement is a way of life.