60pcs 7' Trampoline Springs are ideal for replacing the worn out trampoline springs Compatible for most trampolines, with recommended distance between the trampolines frame and mat being 7' or larger Made of galvanized steel, it offers outstanding resistance to rust, corrosion and crack Slightly curve-shaped hooks offer high tensile strength and ensure stability for trampoline The spring helps to transfer energy slowly and gradually, resulting in high bounce feedback for your trampoline