Superior strength thermo resin provides flexibility and comfort. 30% Wider and 2 times thicker than standard swing seats. Our Thickest Welded link chain has 4000 lb burst strength with a soft rubber coating for maximum grip and each is 55" long. 350 lbs. weight rating when used with Commercial Grade Swing Hangers (PS 7576 - Sold Separately). LIFETIME WARRANTY Includes 1 swing seat, chains and two welded quick-link connectors to connect chains to seat.