INCLUDES - 1pc Hanging Chair Swing Spring 1pc Pin Plug Hardware and 1pc Bearing. The spring and U-pin plugs are made of steel, surface coating process made, rustproof, corrosion resistant. Upgrade Kit Bearing BEARING 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 vibration when 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 chair chairs. SAFER SUSPENSION - With a load capacity of over 500 pounds, the spring can meet the daily use of most families, which is consistent with the load capacity of ordinary egg hanging chairs. EASY TO USE - You can refer to the picture for the installation sequence, the split pin passes through the support and connects to the spring. You can install it or replace the existing ones in a few minutes. QUALITY GUARANTEE - Each piece of product has been carefully checked before packaging. Satisfaction Guarantee For any reason you are not completely satisfied, you can request a replacement or full refund, no questions asked