The Robinair 14390 is a compact, fast and efficient drill-operated pump used to get large volumes of A/C lubricant oil back into commercial refrigerant and HVAC systems. Use with any cordless drill to move 1 gallon of oil in less than 75 seconds, saving time during A/C service. The pump cap fits most 1-gallon oil bottles. Includes a 1/4" flare fitting to connect to A/C or refrigeration systems. Works with ester, alkylbenzene or mineral oil (150-300 SUS) Includes mechanical pump, nylon hose and dip/bottle tube.