Equip your semi to be Ready for the Road Ahead™, with the MGM Brakes 3636 Standard Stroke Combo Spring Brake Chamber, a crucial element 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®.