Use the most advanced air springs to eliminate your vehicle's sag, sway and bottoming out. Distribute weight evenly to your tires, supporting any load without overtaxing your suspension. Pacbrake air springs by Pacbrake are the only heavy duty air springs on the market with one piece aluminum end caps and 20 support wires giving you maximum strength and durability! Pacbrake air springs level your truck's stance while providing added support for an overall smooth and safe ride. Specifications (Individually) Rated for up to 3750 lbs. of load-leveling capacity. 6061-T6 aluminum black anodized end caps. Nylon reinforced rubber air spring. 20 reinforcement wires. Applications vary. Never exceed the manufacturer's recommended Gross Vehicle Weight Rating.