Feature (1) the pumping action and pumping into two independent system, compressed air will not pollute the barrel of oil. (2) using the range typical for factories, auto repair factory, ship maintenance, mining, machinery, agriculture, military, architecture, public transportation. (3) the use of pneumatic pump, without power, can be used in flammable goods place, such as: gas station, garage and other places. (4) the pump body is made of high strength aluminum alloy forging. Oil usage (1) pressure ratio 10:1 is applied to extract the 0#~120# oil, and generally non-aggressive solvent. (2) pressure ratio 32:1 is applied to extract the 140#~200# gear oil, and generally non-aggressive solvent. (3) if you want to know the added quantity of the oil, and suggestions to buy flow meter use. (model: M101, M201 a total of two kinds of reference) (4) if you need to extend to the distant, advice plus windlass used. (model: RE020)