10xPremium Trampoline Springs 1pc 9-16cm Weather Resistant 4.0 Inches Description: Note: Prior to purchasing, measure your from hook end to hook end, disconnected from your trampoline, and completely compressed. Designed to offer the best quality steel, the thickest steel gauge, and the most coils to provide the safest, strongest, and bounciest springs. Stainless steel material trampoline springs feature a zinc plating to protect against corrosion and rust caused by natural acids, moisture, and oxidation. High strength, good flexibility, uniform force, smooth surface. Suitable for all kinds of large, medium and small trampolines. Specifications: Material: 70 Carbon Steel Wire Diameter: 3.0 Size Chart: 3.5 Inches - Overall length: 9cm or 3.54inch Max diameter: 7.5cm or 2.95inch 4.0 Inches - Overall length: 9.5-10cm or 3.74-3.94inch Max diameter: 7.5cm or 2.95inch 4.5 Inches - Overall length: 12cm or 4.72inch Max diameter: 7cm or 2.76inch 5.0 Inches - Overall length: 13.5cm or 5.31inch Max diameter: 7cm or 2.76inch 5.5 Inches - Overall length: 14.7cm or 5.79inch Max diameter: 7cm or 2.76inch 6.5 Inches - Overall length: 16.7cm or 6.57inch Max diameter: 7cm or 2.76inch Package Includes: 1 x Trampoline Spring(10 Pack)