Tosnail Heavy Duty Barrel Shaped Hold up 600lbs Weight Capacity 2 Pack Hammock Chair Spring for Porch Swings, 2" in Diameter and 8" in Length Set of 2. Weight capacity per spring is 600 lbs. The 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 It is in outside diameter 2, inside diameter 1.4 and in length 8 Zinc plated and clear coated for added weather resistance The springs come in sets for porch swings and hammocks and are also available as singles for hanging chairs.