Air Operated Oil Pump's out-looking are different based on reservoir capacity, but feature are the same and pump ratios have 5:1 and 16 :1. It is equipped with the special pressure stabilizer that may output the oil more smoothly and steadily. The flow meter and hose rells are an optional extra. (1)Pressure Ratio:16:1 and 5:1 (2)Can have capacity 30L oil in bulk
