Product Details: Ensure your semi is Ready for the Road Ahead™ with enhanced brake safety, with the Haldex GoldSeal+ 3030 Long Stroke Combo Spring Brake Chamber. To add an extra level of safety, this replacement brake chamber applies the spring brakes once the internal air pressure falls below a certain point. Fashioned with a durable metal body to efficiently contain pressure and the energized spring brakes. FleetPride is your First Click in Heavy Duty®.