"describeUniversal fitness trampoline springs are springs that fit all trampolines on the market, trampoline springs have hooks on both sides that allow them to be attached to the edge of the trampoline on one side and to the mat on the other. Assembly is simple and requires no tools. CORROSION RESISTANT AND SAFE: The spring is made of hot-dip galvanized steel that resists repeated stretching and weathering. They are durable. The premium material ensures that the spring does not break and absorbs every jump perfectly. Resistant to High Tension and Loads - Our high performance replacement springs offer excellent resilience and durability. They provide excellent bounce.Delivery Quantity: 1 PiecePackage Contents: Only the above package contents, excluding other products.Size: 14*2.5cm(Reminder: The size is measured manually, please allow 1-2 cm measurement error)Color: silver(Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)