Kaushalendra Garden Zula Spring For Hammock Porch Swings Set of 2, spring has a weight capacity of 150 kg. each. SPRING STRETCH IS 1 TO 1.5 INCH.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 Swing is a heavy-duty spring. 2" in diameter and 10" in length. It is zinc plated and clear coated to provide additional protection against the elements The springs come in sets for porch swings and hammocks and are also usefull for singles hanging chairs. For oversized swings and hammocks.