Material: Made of high quality steel. Sturdy steel construction. Good performance. Higher corrosion resistance, not easy to rust, more durable. Good performance. Can be used with confidence. _x005F_x000D_ Size: Wire Diameter: 7mm/0.28"", Length: 106mm/4.17"". Robust, solid, can support up to 200 kg (440 lb) for 1 piece of spring and 400 kg (880 lb) for 1 pair of springs. _x005F_x000D_ Function: The spring helps relieve shock stress, provides a more comfortable and softer feel, and will increase the life of your hammock, in addition to your mounting surface. _x005F_x000D_ Simple Assembly: With hooks on both ends, the porch swing spring easily connects to your hammock chair without using any tools or complicated operation. _x005F_x000D_ Versatile: Suitable for almost any garden patio porch and garden swing, hammock, hanging chair, punching bag, cocoon, rattan chair wicker basket, etc. _x005F_x000D_ _x005F_x000D_ Feature: _x005F_x000D_ brand new and high quality _x005F_x000D_ Made of heavy-duty steel, zinc-plated for better weather resistance. _x005F_x000D_ Helps reduce impact stress and provides comfort; increases the life of your hammock and mounting surface. _x005F_x000D_ Suitable for almost all punching bags, hanging chairs, hammock chairs, cocoons, egg chairs. _x005F_x000D_ _x005F_x000D_ Specifications: _x005F_x000D_ Load capacity: 200kg / 440lb (for 1 piece of spring), 400kg / 880lb (for 1 pair of springs) _x005F_x000D_ Material: Steel _x005F_x000D_ Size: Length 106mm _x005F_x000D_ Colours: Silver _x005F_x000D_ Quantity: 4pcs _x005F_x000D_ _x005F_x000D_ Package included: _x005F_x000D_ 4 x Spring hook _x005F_x000D_ _x005F_x000D_ Notes: _x005F_x000D_ 1. Please allow 1-3cm error due to manual measurement. Please make sure you do not mind before bidding. _x005F_x000D_ _x005F_x000D_ 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please take the real one as the standard. Thank you _x005F_x000D_ _x005F_x000D_ 3. Remember to check the condition of the hammock extension spring before use.