DeWalt 30-gallon air compressor features a cast iron, twin cylinder, oil lubricated pump with a one-piece cast iron crankcase, thermally stable cast iron cylinder body, aluminum head & valve plate, automotive style ball bearings, durable Swedish stainless steel reed valves, oil level sight glass, easily accessible oil fill and a 12" cast iron balanced flywheel. Unit has a heavy duty induction motor for maximum performance and efficiency.