Get your air brakes Ready for the Road Ahead with a leak-free hose coupling, with the Power Products 1/2" x 3/8" Male Hose Brass Connector. This replacement brass connector seamlessly transfers compressed air between brake lines in heavy duty trucks, leading to fast and responsive brakes. Engineered with a compact design for tight-fitting spaces, and a corrosion-resistant blend of zinc and copper. FleetPride is your First Click in Heavy Duty .