Description: 304 stainless steel material,silver tone,dual hook. Tension spring can be used in many occasions, such as production and assembly, experiment, research and development, maintenance, etc.. Spring in the global market occupies an important position, are widely used in marine, computer, electronics, automotive, mold, biological, chemical, aerospace, railway, nuclear power, wind power, thermal power, engineering machinery, mining machinery, construction machinery, elevators, and other fields