Features - Made Of Galvanized Iron. Higher Corrosion Resistance Is Hard To Rust And More Durable. Good Performance. Can Be Used With Confidence.Function - Springs Help Reduce Vibration Pressure, Provide More Comfortable, Softer Feelings And Extend The Life Of The Hammock In Addition To Mounting Surface.The Set Is Simple - Both Ends With Hooks, The Rotating Porch Spring Can Be Easily Connected To Your Hammock Without Using Tools And Complex Operations.Replacement Spring - Suitable For Garden Swing, Hanging Baskets And Hangers.Specifications - Packing: 8Mm Spring Tension * 3. Materials: Galvanized Iron. Weight: 250 Grams Per Unit. Length: 115 Mm.Spring Hamock, Hard Spring Spring Hanging Hammock 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 MmFeatures:Lightweight. It Is Very Convenient To Carry.- Galvanized, Increasing The Ability To Withstand Bad Weather.Note:1. For Manual Measurement, Please Allow 1-3Cm Error. Make Sure You Don'T Mind And Then Bid.2. Due To Differences Between Different Displays, The Picture 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.