High QualityThe Hammock Chairs Swing Spring Sets is made of 304 stainless steel.The surface has a waterproof and transparent coating, high hardness,strong and durable, and longer life. Hold Weight 1300lb: Heavy duty stainless steel spring for,each porch swing can hold weight of 1300lbs. Safety Design: The spring for swing with plastic cap are covered the end of the wire to prevent scratching fingers or hanging ropes, which also prevents springs from falling off from the hokes. The premium heavy duty wire ensures never broken under heavy load. Anti Rust:This porch swing springs heavy duty is made of stainless steel and chrome plated,which means it is easy to clean and not tend to rust no matter indoor or outdoor. Widely Use: These porch swing spring kit are tightly coiled for shock absorption. You can use them for swing benches, hanging chairs, hammocks, hammock chairs, and punching bags, you can also use it for industrial application where need reduce vibrations and avoid shocks. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store