[HEAVY-DUTY STEEL] Galvanized steel trampoline springs feature a zinc plating to protect against corrosion and rust caused by natural acids, moisture, and oxidation. [MORE SPRING FOR YOUR BOUNCE] Thicker gauge steel, greater coil count, and wider taper. These reinforced trampoline springs not only replace your worn-out springs, they enhance the whole bouncing experience! [SAFETY IN MIND] Our premium springs have been tested over 200,000 times. [SIZE MATTERS] We recommend double checking your spring size before ordering as they may have stretched over time. Remove at least 3 springs and measure from end to end to find an average. Pack of 36 – Larger Packs available Be ready to bounce when you update your home or family trampoline with the SkyBound USA Standard Universal Replacement Trampoline Springs. Old, worn-out springs on your trampoline will dull the bounce and become dangerous if they break, come loose, or overstretch. Made of galvanized steel, our heavy-duty springs have a zinc coating to protect them against corrosion and rust caused by natural acids, moisture, and oxidation. Available in 12 to 48-pack counts sized from 3.5 to 8.5 inches, each set includes a convenient spring tool to help with installation. Only the trampoline springs and spring tool are included. All other trampoline parts are sold separately. The spring design features tapered hooks, rubber tips, and more coils to help you feel safe and secure with your active lifestyle investment. Always measure your trampoline springs before purchasing a replacement. The ideal spring to measure will be one with a spring coil so tight that a piece of paper can't slide through. Disconnect at least three of these spring types and measure them from hook to end to find the right size. We include detailed installation instructions with every piece to help you get the perfect fit. At SkyBound USA, our goal is to nurture the inner child in all of us by uniting communities worldwide and promoting an active lifestyle. Founded in 2009, SkyBound USA began as a trampoline replacement parts supplier for other trampoline brands sold at many major retailers across North America. Since 2014, we've emerged within the industry as a premium trampoline and outdoor activities brand focused on designing quality products.