The MGM Brakes 3030 Type Piggyback Spring Brake Chamber is designed to provide superior performance and reliability in parking brake applications. This tamper resistant chamber features a reinforced non-pressure chamber housing with welded mounting bolts for added strength and durability. The chamber is constructed from epoxy coated heavy duty steel for superior corrosion resistance and long lasting performance. The internal push rod is made from a low friction polymer guide with a nitrile rubber air seal for superior sealing and performance. FleetPride is your First Click in Heavy Duty®.