The Meritor 4.0 psi Air Brake Relay Valve the ultimate solution for your braking needs. Proudly made in the USA, our valves are designed, engineered, manufactured, and assembled to the highest standards of quality and excellence. Crafted primarily from a zinc alloy, our valves are built to last and endure even the toughest conditions. Each valve is subjected to 100% pneumatic and submersion testing to ensure reliable and consistent performance. With in house die-casting and machine shop facilities, we have complete control over the production process, ensuring that every valve that leaves our facilities meets our strict quality standards. Our plug units are designed to making installation quick and easy. and with a 2-year warranty. FleetPride is your First Click in Heavy Duty®.