The Edelbrock/Russell Flare Union Pressure Adapter Fittings are made from light-weight aluminum and allow for the connection of hose ends to other components like oil pumps, fuel pumps and fuel filters. These fittings are designed to match up with all Russell hose and hose ends. They assure positive sealing and come in a corrosion-resistant finish. It has a 1/8" NPT (National Pipe Tapered) side port.