Heavy duty hammock spring do heavy bag, swing outside Description: High-quality material: The hammock spring is made of electrophoresis, premium and durable. Excellent performance: The spring of the hammock chair with good elasticity has high strength and strength. Protective spring: The swing spring has good shock absorption ability, ideal do yoga, patio swing, hanging chair, sandbag box, etc. Easy installation: The swing spring on the porch is easy to install and versatile for any size. Wide Applications: This hammock spring is widely suitable do swing, swing, hammock, tent, boxing, porch swing and punching bag, etc. Specification: Material: Electrophoresis Size Chart: 18 cm/7.09 inch The package includes: 1 Spring 1 rope Note: 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.