Product Introduction：The spring is made of highly elastic steel and has a very strong tensile and toughness, giving your trampoline more happiness.
The surface of the spring is galvanized to prevent oxidation and rust, increasing the service life of the spring. Hooks for firm hold, no fear about springs coming off when jumping.
The springs are made of high-quality galvanized steel, anti-rust, unbreakable, crack-resistant, excellent resilience and durability. Offering the best quality steel to provide the safest, strongest springs so that will give you a better jumping experience.
Two end of the hook is curved at an angle that provides the superior hold. So, they are extremely safe. High plasticity, good fatigue resistance and uniform stress. You can jump and bounce without the fear of the springs coming off.