Oil Lubricated. Designed especially for framing nailers. Oil lubricated for cooler operation and reduced noise. High output cast iron pump delivers maximum performance and operational life. Big Bore cylinder and piston feature high output at lower RPM with reduced heat buildup, less noise and longer operational life. Low amperage draw reduces incidents of tripped breakers and voltage drops that cause premature motor failure. Easy view oil gauge and large pressure gauges for quick identification. Air pressure regulator enables easy adjustment of line pressure. Features 2 quick connect air hose fittings. Finned discharge tube promotes safe and efficient cooling. Stores 50' of 3/8" air hose with handle folded or upright.