XIANQI Double Hook Spring Extension Springs,compression Springs Spring Hook Spring High quality: The tension spring is made of stainless steel material, which is strong, not easy to deform, not easy to rust, and durable. Widely used: Springs play an important role in life and are widely used in ships, computers, electronics, automobiles, molds, biology, chemical industry, aerospace, railways, energy nuclear, engineering machinery, construction machinery, elevators and other fields.. Color: silver The diameter of the steel wire is 1.5mm, the outer diameter of the spring is 10mm, and the free length is 47mm. ; The package includes: You will get 10 tension springs, enough for your production and assembly, experiment, research and development, maintenance, etc