This heavy-duty spring made of zinc-coated wire is suitable for hanging hammock chairs and other hanging accessories such as punching bags, hanging plants, etc. Easy to install and use, it can provide you with great convenience. Durable, rust-proof, corrosion-resistant, not easy to deform and break. Practical and durable. Features-Color: As shown-Material: Galvanized steel wire-Size: About 13.50X2.20X2.20cm /5.31X0.86X0.86in-Replacement springs to meet your different needs. It is a good 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 into the support 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 resisting impacts and dynamic loads, and has good seismic performance. Packing list: 12 x Springs 1 x Hook