Trampoline Part Store&reg; 5.5" Inch Ultra-grade* Trampoline Springs, Quantity of 24, Extension Spring, Farming, Ranching, Machinery, Maintenance, Home Repairs Trampoline Part Store 5 1/2" inch, Extension Spring, Farming, Ranching, Machinery, Maintenance, Home Repairs Top Quality (30-Coils) Trampoline Springs made for the ULTIMATE, EXTREME BOUNCE!! Quantity of 24- per pack The Outside Diameter of our Springs are 1.1 inches, we use 8-gauge high tenacity Steel Music Wire, The Wire Diameter of our Springs is 0.125 of an inch thick (1/8 inch). The Measurement is Over The HOOK Trampoline Part Store Will fit any trampoline requiring the specific spring length shown, Plus or MINUS up to 1/4 inch Replace your Springs with a set of our Made in the USA Springs