No compressed air needed! The JohnDow Manual Pump Fluid Extractor can be used in any location to quickly and cleanly change out all types of engine fluids. Simply place on the ground, secure with the sliding foot pedal, and use the hand pump to remove reservoir fluids through filler ports or dipstick tubes via simple vacuum displacement. Tough, chemical-resistant HDPE construction. Fluid reservoir capacity: 1.7 gallons. Includes 3 extractor tubes: .23"OD x 2.9'L, .26"OD x 2.9'L, .39"OD x 3.2'L. Quickly remove fluids from engine reservoirs Easy manual hand pump operation Chemical-resistant HDPE construction Interchangeable .23", .26", and .39" extractor tubes