INCLUDES - 1 pc Hanging Chair Spring, 1 pc Pin Plug Hardware and 1 pc bearing. The spring and U-pin plugs are made of steel, surface coating process performed, rust-proof, corrosion-resistant. Upgrade kit Bearing STORED is made of steel, has excellent wear resistance, high temperature resistance and high hardness. It can effectively increase lubrication and reduce noise. The spring can absorb the vibrations of shaking, play a buffering role, increase the life of the chair and make it more comfortable when shaking. WIDE APPLICATION - For use with almost all hanging chairs, egg chairs, porch swings, freestanding swings, hammocks and hanging chairs. SAFER SUSPENSION - With a load capacity of over 500 pounds, the spring can meet the daily use of most families, which is compatible with the load capacity of common egg hanging chairs. EASY TO USE - You can refer to the picture for the installation sequence, the cotter pin passes through the support and connects to the spring. You can install it or replace the existing ones in minutes. QUALITY GUARANTEE - Each product piece has been carefully checked before packing. Satisfaction Guarantee For any reason you are not completely satisfied, you can request a replacement or full refund, no questions asked