Product Details: The Velvac 3/8" NPT Ports 4-Way Spring Return Solenoid Valve is a reliable and durable valve designed to provide reliable performance in a variety of applications. This valve is crafted with the same materials used in Velvac air accessory valves, ensuring a long-lasting and reliable performance. This 4-way spring return valve also features an external manual override, allowing you to manually control the valve when needed. FleetPride is your First Click in Heavy Duty®.