A tension spring is a spiral spring that bears axial tension. In general, tension springs are made of circular-section materials. Extension spring coils are generally tight without clearance when there is no load. Square, flat wire, and other tension springs are also available. The material, size and end of Custom Extension Spring can be customized. We are a coil spring manufacturer in China that provides quality Custom-made Extension Spring at low prices to overseas customers.To learn more please visit:https://chinacustomspring.com/custom-extension-spring
