INCLUDES- 1 pcs Hammock Chair Swing Spring 1 pcs Pin Plug Hardware 1 pcs bearing.The spring u-pin plugs are made of steel, surface paint baking process made, rust-proof, crosion-resistant.Upgrade Kit Bearing - BEARING made of Steel, have great wear-resistant, high temperature resistance high hardness It can effectively increase lubrication reduce nois.Spring can absb the vibration when shaking, play a buffering role, increase the chair service life, make it me comftable when shaking.WIDE APPLICATION-F Use With Almost All Hanging Chair,egg chair,pch swings, free-sting swings, hammocks hammock chairs.SAFER SUSPENSION-With a load-bearing capacity of me than 500 pounds, the spring can meet the daily use of most families, which is consistent with the load-bearing of dinary egg hanging chairs.EASY TO USE-You can refer to the picture f the installation sequence,clevis pin passes through the suppt connects to the spring.You can install it replace the existing ones with in minutes.QUALITY GUARANTEE-Every piece of product has been carefully checked befe packaging. Satisfaction guaranteedF any reason you're not completely satisfied, you can ask f a replacement full refund, no questions