Features: The replacement trampoline spring have high durability and weather resistant, giving you the best possible and longest-lasting bounce. Compared with ordinary trampoline springs, the silver spring has a tapered design with tight coils, which offer the spring better elasticity and stretch ability. The trampoline spring has two different ends; One is designed to be more curved to better hold on to the mating clips; The other end is less curved and is designed to go into the metal frame. The replacement springs are the great replacements for your broken, stretched out or even rusted springs; With the help of trampoline spring pull tool, the installation will be much easier. Prior to purchasing, please measure your original springs from end of hook to end of hook; Specifications: Material: Galvanized Steel 5 sizes to choose from 12cm / 4.72in 13.5cm / 5.31in 14.7cm / 5.79in 16.5cm / 6.50in 17.8cm /7.01in Color: As the Picture Shows Package Includes: 1 x Trampoline Spring note: Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!