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, corrosion-resistant, 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 corrosion-resistant, wear-resistant and durable. long service life.-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.Packing list: 12 x Springs 1 x Hook