Features - Made of galvanized iron. Higher corrosion resistance is difficult to rust and more durable. Excellent performance. Can be used with confidence. Function - Springs help reduce vibration pressure, providing a more comfortable, softer feel and extending the hammock's lifespan beyond the mounting surface. Easy Assembly - Both ends with hooks, the porch swing's rotating spring can easily be connected to your hammock without using tools or complex operations. Replacement Spring - Suitable for garden swings, hanging baskets, and hangers. Specifications - Packaging: 8mm tension spring * 3. Material: Galvanized iron. Weight: 250 grams per unit. Length: 115 mm. Hammock Spring, Heavy-Duty Hammock Spring for Hanging Chairs, Outdoor Accessories, Garden Swing Hook (8 mm) Specification: Material: Galvanized iron. Weight: 250 grams per unit. Size: Length 115 mm. Color: Silver. Quantity: 3 * 8 mm Features: Lightweight. It is very convenient to carry. - Galvanized, increasing the ability to withstand bad weather. NOTE: 1. For manual measurement, please allow an error of 1-3 cm. Make sure you don't mind before you bid. 2. Due to differences between different monitors, the image may not reflect the actual color of the project. Please take the actual standard. Thank you! 3. Remember to check the condition of the hammock before use.