Specification Wire diameter 2mm/0.79inch, outer diameter 18mm/0.71inch, free length: 140mminch, 2 springs in total. Material The double hook spring is made of high quality stainless steel, which is not y to rust and corrosion, wear resistant and high temperature resistant, and can be used for a long time. Function The spring can be used in many occasions such as production assembly, experimentation, research and development, maintenance, etc. It can be widely used in electronics, household appliances, furniture, machinery, etc. Packing 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 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 supports 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. The 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: 140mm Spring Size: (Outer Diameter): 18mm/0.71inch Wire Diameter: 2mm/0.79inch Material: Stainless Steel Finish: Polished Package Contents packing: 2 x compressed spring The size is mured manually, ple allow the error (1-3 cm). Due to different monitor pixels, there may be color difference, ple refer to the actual product. After receiving the package, if there is any dissatisfaction, ple contact me first, do not leave negative feedback ily, thank you and have a nice day.