Product Details: The SealCo 3/4" Reservoir Port Relay Emergency Valve is the perfect solution for any braking system. This valve is designed to provide robustness and dependability, ensuring that the braking system will operate properly and efficiently. With a 3/8" control port size, this valve is easy to install and maintain. It guarantees top efficiency and security, making it the ideal choice for any braking system. With its reliable performance and simple installation and upkeep, it is the perfect choice for any braking system.<br/><br/>FleetPride is your First Click in Heavy Duty®.