DESIGNED TO WITHSTAND MASSIVE WEIGHT Along with perfect bounce, these spring clamps will revive your trampoline and bring it back to as good as new for years to come. HEAVY-DUTY HOOKS These trampoline springs come with heavy-duty hooks that are easy to install, all you need is a T-hook to attach these springs. DURABLE & HARD-WEARING Our silver standard trampoline springs are durable as well as long-lasting that gives you a perfect high jump and tight landing. COLD WEATHER RESISTANCE POLISH The springs are coated with cold weather resistance polish, which prevents them from cracking. Moreover, the coil spring has an innovative rust free design. Product Size: 22mm Features: -Material: Heavy duty galvanized. Spring is designed to give it that great bounce. Cold weather crack-resistant. Box Contains 15 Springs