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. .Cut: The size of the tension spring is 1x10x50mm: the diameter of the steel wire is 1mm, the outer diameter of the spring is 10mm, and the free length is 50mm. .The package includes: You will get 10 tension springs, enough for your production and assembly, experiment, research and development, maintenance, etc. .Service Guarantee: If you have any questions, please contact us at any time, we will help you solve it within 24 hours. If you are not satisfied with our products, we support exchange and refund. .