Designed for heavy shop or industrial use, Ingersoll Rand Two-Stage electric air compressors provide the quality and performance that are ideal for most applications and users, including: automotive service and body shops; fleet maintenance; machine shops; production and manufacturing lines; construction; wood working shops; dry cleaners; car washes; maintenance/repair shops and farms. Features : Durable cast-iron, two-stage design offers extended pump life for years of trouble-free service 175 PSI maximum operating pressure 100% continuous duty for tough applications Automatic start/stop control/pressure switch operation Includes motor starter, oil sight glass (10-15 HP only), manual drain The Inside Story : A two-stage model Compresses air to an intermediate pressure in the first stage Removes heat of compression through an intercooler, and Compresses air to a final pressure in a second compression stage. Two-stage compressors are more efficient and are generally used for pressures above 100 PSI (maximum pressure to 175 PSI). No other Reciprocating Compressor offers these efficient, cost-saving features : A durable cast iron pump which provides 15, 000+ hours of trouble-free service A 100% copper finned intercooler lowers operating temperatures and extends pump life An overhung crankshaft and single-piece connecting rod allow access to the running gear for easy maintenance Individually cast cylinders provide flexible, less expensive maintenance on just one cylinder at a time rather than servicing the entire pump