... plasticity, flexibility strong, powerful anti-stress. Product description: Spring Wire use of materials for:65# 70#, 65Mn,82B, ... , flexibility strong, powerful anti-stress. Uses: Mainly used for spring, Simmons bed, vehicles and various cushions, machine manufacturing, electric ... tools, Electrical equipment and so on.Specifications: Line diameter Φ0.20 mm-Φ6.50 mm. spring wire