Are your trampoline springs stretched out of shape or broken? Or, you just look for springs to assemble your trampoline? Here comes our Heavy-Duty, High Tensile Springs made from Galvanized Steel, which will be good choice for your replacing or assembling. Package Included: 20 x 5.3" Trampoline Spring (One Set). ***Notice: When replacing your trampoline mat ,it is a good time to inspect all trampoline springs. Trampoline springs that are over-stretched ,loose or have damaged hooks should be replaced for your safety.