Premium grade gym ring is made of High Density Polyethylene and will not crack or break. Features a Power Grip and Metal Grommet for rugged play. Superior strength welded link chain has a soft rubber coating. Solid-through construction Not hollow. Weight rating of 350 lbs. when used with Commercial Grade Swing Hangers (PS 7576 - Sold Separately). LIFETIME WARRANTY Includes 2 gym rings with chains and 2 Quick-link Connectors to connect rings to chains.