Challenge Power Transmission(zhuji) Ltd is a one of the leading manufacturers of vehicle-fitting and mechanical components in China. Our main products are S-camshafts, brake shoes, brake linings and manual slack adjusters, air chamber, repair kits, break hardware, King-pins etc. The factory is certified Quality Assurance System-ISO 9001/2000.Our products feature good quality and the lowest price, prompt delivery, full stock and guaranteed satisfaction. Challenge Power Transmission(zhuji) Ltd is a certain that the quality of our product and the service we provide will benefit you and your bottom line. Kindly check our website to get details: