This is our pneumatic 4. 2 CFM air operated vacuum pump. It is easy to operate, simply connect the Air Line and it pulls full vacuum in less than 2 minutes. This air vacuum pump is ideal for automotive air conditioners, home air conditioners, refrigerators and freezers. The air vacuum pump is a AC pump that eliminates moisture from air conditioning systems, making it safe and easy to add refrigerant. If you are looking for an vacuum pump like this, don't hesitate to buy it! Easy to operate, simply connect the air line and it pulls full vacuum in less than 2 minutes Suitable for r 134 a and r 12 automotive use, includes fittings Venturi-type ac pump eliminates moisture from air conditioning system, makes it safe and easy to charge refrigerant Perfect for automotive air conditioning system, home air conditioner, refrigerators, freezers and much more