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 description Size: 22mm Features: -Material: Heavy duty galvanized. Spring is designed to give it that great bounce. Cold weather crack-resistant. Box Contains 15 Springs