General description 5.5 Inch Trampoline Spring, Heavy Duty Stainless Steel Replacement Tool. Its slightly curved shape is more durable and has higher tensile strength than the straight type. Technical specifications Length: 5.5 inches Diameter: 3 mm Compatibility and accessories Compatible with any trampoline with 5.5-inch springs Includes: 5 trampoline springs Installation Measure the length of the spring from one end of the hook to the other before purchasing Replacing damaged springs promptly will ensure the strength of your trampoline