The Power Products Male Elbow Brass Fitting is approved and marked by D.O.T making it perfect for air brake applications. It offers better flow than traditional compression fittings with inserts and is generally accepted for air brake applications, with the exception of installations from frame to axle and between towed and towing vehicles. It features cutoff and quick synchronization, making it ideal for applications that need to fit tightly behind the dash. FleetPride is your First Click in Heavy Duty®.