5:1 Ratio Oil Pump, 11 GPM. Perfect for fluid oil transfer in high volume and longer distance applications. Typical fluids handled include motor oil, synthetic oil, hydraulic oil, gear oil, and automatic transmission fluid. Corrosion resistant. Few moving parts in the air motor assembly. Two year warranty. Large air porting design for continuous pump operation without icing. Supplied w/ adjustable 2" bung adapter and foot valve.