The WABCO 12.9" Air Disc Brake Chamber Diaphragm is designed to provide reliable and smooth braking performance. This aftermarket part is manufactured with high-quality materials for durability and longevity. It is designed for a perfect fit and easy installation, making it an ideal choice for your vehicle. With its reliable performance, this part is sure to keep your vehicle safe and secure on the road. FleetPride is your First Click in Heavy Duty®.