SINGLE STAGE AIR COMPRESSOR PUMP. (3 HP, 135 PSI). Single Stage Air Compressor. (F)NPT OUTLET IN. CHECK MY FEEDBACK OF OVER 25,000 POS. PLEASE SEE MY OTHER AUCTIONS FOR MORE QUALITY TOOLS & OTHER ITEMS. The item “New! Ingersoll-Rand Single Stage Air Compressor Pump, 3 HP, 135 PSI SS3 Bare” is in sale since Tuesday, September 06, 2016. This item is in the category “Business & Industrial\Light Equipment & Tools\Air Compressor Parts & Accs\Other Air Compressor Parts”. The seller is “1to4″ and is located in Bremen, Indiana. This item can be shipped to United States.