4" Heavy Duty Hammock Chair Spring Porch Swings Spring,punch Bag Spring Suspension Hooks,2packsThe hanging chair spring length is approx 10cm(4), thickness of steel is 7mm(0.27),Spring capacity over 1000lb<br> The swing springs are SUPER HEAVY DUTY,will absorb the shock and preserve the longevity, Reduce noise, vibration and stress,not stretch out<br> Hammock Spring is Zinc plating on the harden steel,surface electric galvanizing,Sturdy and Anti-corrosion,enhance the weather resistance and lifetime of the porch swing spring.<br> The heavy duty spring locates between the overhead support and swing chain to provide a more comfortable, softer feel to porch swings, free-standing swings, hammocks and hammock chairs.<br> The Spring Hook Fits Almost All porch swings Bag,Hanging Chairs,Cocoon,hanging egg chair,wicker basket Gard,Hanging Hammock Chairs,heavy bags, boxing ,yard sling swing and other any of your favorite sport<br> 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-DIMEANI official store