Hangzhou Xingfa Spring Co., Ltd which is specializing in spring for more than 30years. And it is one of domestic large companies in manufacturing springs, is a Spring Association of China Unit, is a Failure Analysis Association of China Machinery Engineering Unit and is a member of China Committee of Standardization for Spring. At present, the company has 300 employees and 80 professional engineers and managers, and 28 of them work in research and development directly. And it also has 320 sets equipment which are used for all kinds of production, research and development and inspection. Among about 1500 private-owned spring industries in China (The industries whose sales is less than 5 million are not included. ), Hangzhou Xingfa Spring Co., Ltd. Places the leading position in ratio of profit to sales, equipment capability, technology level, self- innovation and so on. Our products such as automotive clutch spring, car clutch spring. Truck clutch spring. Hydraulic torque converter spring. Automotive hinge spring. Bulldozer spring. Grab spring and so on.