Prepare your vehicle with Expertise Built In® with OTR Type 3030 Long Stroke 13" Rod Spring Brake Chamber, which 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 meet and exceed OEM standards. It uses standard power spring technology for unparalleled force output consistency and its heavy duty housing is designed to withstand impact and extreme conditions. OTR heavy duty parts offer the same form, fit, and function as OE. With comprehensive research, independent testing, and continuous product development, OTR heavy duty parts are sure to keep you and your truck safely on the road. In addition to providing the highest quality of heavy duty truck and trailer parts, you can rely on OTR warranties to be comparable or better than OE and top brands. FleetPride is your First Click in Heavy Duty®.