This is a great item, it works by compressor or manually as a regular pump. It is used for quick suction of used oil or other liquids without unnecessary fuss. By the way, it is a professional pneumatic pump, which is used by car mechanics in services. It comes with a one and a half gallon tube, drain tube, dipstick, extensions, suction hose, and, of course, a user manual. All in all, this pump is just perfect if you have an auto, motorcycle, lawnmower, tractor, or boat and you're tired of paying money every time you need an oil change. With this kit, you can do the maintenance yourself.