Product Details: Prepare your semi to be Ready for the Road Ahead™, with the Bendix 3030 Standard Stroke S-Cam Spring Brake Chamber that provides enhanced brake safety. 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®.