Description Please note it: It is better to measure the length of your springs from hook end to hook end,which is disconnected from your trampoline and completely unstretched Material: Made of high quality Metal material, and sturdy,unbreakable ecellent resilience and durability Size: These steel trampoline springs measure about 5.5 inch/14 cm in length,and 3mm in the diameter of steel wire,28 coils in total Curved hook: One end of the hook is curved at an angle that provides the ecellent hold,which is safe to jump and bounce without fear about springs off T-hook: We etra provide you with a strong T-hook in order to help you easily and quickly replace your rusted and dangerous springs to return bounce to make your trampoline come alive again Colour:silver Material:Metal Package Contents: 16 * Trampoline spring 1 * Trampoline T Hook Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.