Specification: Wire diameter 2mm/0.79in, outer diameter 18mm/0.71in, free length: 150mm/5.91in, 2 springs in total. Material: The double hook spring is made of high quality stainless steel, not easy to rust and corrosion, resistant to wear and high temperatures, and can be used for a long time. Function: The spring can be used in many occasions such as production assembly, experiment, research and development, maintenance, etc. It can be widely used in electronics, household appliances, furniture, machinery, etc. Package: 2pcs x Compression Spring, Type: Double Hook. The surface of the spring is uniform and beautiful, and has been polished to improve the surface finish of the spring. The spring has a strong load-bearing capacity. Principle: The stainless steel spring can produce greater elastic deformation when loaded, converting mechanical work or kinetic energy into elastic potential energy . The tension spring is a spiral spring that bears axial tension. Feature: Our tension springs have passed strict and professional technology to ensure product quality. The springs have good elasticity, high precision and beautiful appearance. Stainless steel springs are polished after they are made, and the springs have strong load-bearing capacity. Our spring can meet your daily needs. Type: Double Hook Color: Silver Free Length: 150mm/5.91inch Spring Size: (Outer Diameter): 18mm/0.71inch Wire Diameter: 2mm/0.79inch Material: Stainless Steel Finish: Polished Package Content: 2 x Compressed Spring