1: Please perform spring measurement from of the hook to the hook without being installed on the trampoline, so as to make accurate measurements when ordering 2: Using stainless steel materials, resistance, not afraid of bending, good elasticity. New waist drum design, smooth forging , no burr for precision forging. 3: These enhanced trampoline springs can not only replace worn springs, but also enhance the entire bounce experience! 4: Galvanized steel trampoline spring is galvanized to prevent and rust caused by natural acids, moisture and oxidation. 5: Suitable for all kinds of large, medium and small trampoline. colour: silver Material: stainless steel size: 140mm Package Contents: 10*springs 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.