The Bendix® EnduraSure®-Pro is a high-performance double-diaphragm spring brake chamber designed for heavy-duty commercial vehicles, including both drum and air disc brake systems. It is engineered to be the lightest weight chamber in its class. It offers a No Touch™ Power Spring - a proprietary design that prevents "coil clash" as well as superior durability and corrosion protection. The EnduraSure®-Pro contains a sealed spring chamber designed for extreme longevity and severe environments.