Qingdao TYWIN Co. Ltd located in Qingdao is a professionally supplier of die springs in China. Our springs are made from high tensile strength rectangular shaped chrome silicon material and available in metric and inch sizes based on the European Standard (ISO10243), Japanese Industrial Standards(JIS), and American Standard. We offer a full range of diameters and lengths for every standard to meet your need. Furthermore, we have capacity to manufacture custom die springs to serve your special needs.