The Powermate 3.7 HP 60 Gallon Oil-Lube Vertical Air Compressor is designed for the heavy duty needs of the mechanic shop, livestock operation and service truck. It features a cast iron twin cylinder pump with a one piece cast iron crankcase, thermally stable cast iron cylinder body, aluminum head and valve plate, automotive style ball bearings, durable Swedish stainless steel reed valves, oil level sight glass, easily accessible oil fill and a 12 in. cast iron balanced flywheel.Featuring extra heavy duty components, this air compressor is built to last under the toughest, most demanding conditions.