Cylindrical coiled springs are mainly divided into leaf springs, tension springs and torsion springs. We can design and produce various springs according to user's requirements with material diameters ranging from 0.3mm to 50mm and sections of round, rectangle or trapezoid etc. We are in possession of complete sets of equipment including universal automatic spring winders and various specialized machines. There are over a thousand of spring specifications available. Except for conventional springs, we also produce various non-standard springs with complicated shapes and high precision requirements such as protruding or concave springs, combined spiral springs and flat springs etc.; hook or ring-shaped tension springs and various torque springs etc.; and the springs that are required to resist high temperature or corrosion etc.