This heavy duty spring made of zinc-coated wire is suitable for hanging hammock chairs and other hanging accessories like punching bags, hanging plants, etc. Easy to install and operate, can bring you great convenience. Wear-resistant, rust-proof, , not easy to deform and break. Practical and durable. Features -Color: As Shown -Material: Galvanized Steel Wire -Size: Approx. 13.50X2.20X2.20cm / 5.31X0.86X0.86in -Replacement springs to meet your different needs. It is an choice to replace the old spring. -Which is , wear-resistant and durable. . -When installing, just hook the hooks at both ends of the spring to the supporting net at the bottom of the trampoline. -Our springs have good tension and can make your trampoline give you a better bounce experience. -And the structural reliability is high, suitable for withstanding impact and dynamic loads, and has good seismic performance. Package list: 12 x Springs 1 x Hook