Prepare your semi to be Ready for the Road Ahead™, with the MGM Brakes 3036 Long Stroke Combo Spring Brake Chamber that provides enhanced brake safety. This replacement brake chamber applies the spring brakes once the internal air pressure falls below a certain level, acting as an additional safety measure for suspended loads. Engineered with a durable metal body to efficiently contain pressure and the energized spring brakes. FleetPride is your First Click in Heavy Duty®.