Note: Prior to purchasing, measure your original springs from hook end to hook end, disconnected from your trampoline, and completely compressed.<br> Designed to offer the best quality steel, the thickest steel gauge, and the most coils to provide the safest, strongest, and bounciest springs.<br> Stainless steel material trampoline springs feature a zinc plating to protect against corrosion and rust caused by natural acids, moisture, and oxidation.<br> High strength, good flexibility, uniform force, smooth surface.<br> Suitable for all kinds of large, medium and small trampolines.<br> Specification:<br> Material: 70# Carbon Steel<br> Wire Diameter: 3.0<br> Size Chart:<br> 3.5 Inches - Overall length: 9cm/3.54inch; Max diameter: 7.5cm/2.95inch<br> 4.0 Inches - Overall length: 9.5-10cm/3.74-3.94inch; Max diameter: 7.5cm/2.95inch<br> 4.5 Inches - Overall length: 12cm/4.72inch; Max diameter: 7cm/2.76inch<br> 5.0 Inches - Overall length: 13.5cm/5.31inch; Max diameter: 7cm/2.76inch<br> 5.5 Inches - Overall length: 14.7cm/5.79inch; Max diameter: 7cm/2.76inch<br> 6.5 Inches - Overall length: 16.7cm/6.57inch; Max diameter: 7cm/2.76inch<br> Package Includes:<br> 1 x Trampoline Spring(7 Pack)<br> Note:<br> Please allow slightly measuring deviation due to manual measurement.