Keeping you Ready for the Road Ahead , the HD Value 3030 Long Stroke 13" Push Rod Combination Spring Brake Chamber comprehensively converts energy from compressed air to apply the right amount of powerful force to your semi truck's brakes. This heavy duty spring brake chamber replacement is manufactured with high-quality parts to not only meets, but also exceeds OEM standards. This HD Value brake chamber adheres to SAE tensile strength standards with a thick steel push rod-plate exceeding OE standards. FleetPride is your First Click in Heavy Duty .