Description: 【Premium Material】: The trampoline spring are made of alloy, ensuring durability and longevity, offering great rust resistance and maintaining their springiness even after years of use. 【Easy Installation】: With Hook for easy installation. The Hook helps pull spring and securely attaches to your trampoline frame, labor saving. 【Good Performance】: The spring provide good tension for an enjoyable jump while ensuring security and reliability. 【Comprehensive Set】: This package includes 5 replacement spring, 1 trampoline triangle buckle, 1 webbing, and 1 hook. It gives you everything you need for your trampoline maintenance needs. 【Versatile Use】: These replacement spring are for various brands and models of trampolines. Please confirm size before purchasing. Specification: Material: Alloy Size Chart:Spring 9cm/3.54inch Package Includes: 5 Spring 1 Hook 1 Triangle Buckle 1 Webbing Note: Please allow slightly errors 1-2cm differences due to manual measurement.