Goplus Pneumatic 4.2CFM Air Operated Vacuum Pump A/C Air Conditioning System Tool Auto Easy to Operate---The air operated vacuum pump is suitable for R134a and R12 automotive use. And with our clear instruction, you don't need any complicated steps, just simply connect the air line and it pulls full vacuum in less than 2 minutes. Multi-Purpose---Our pneumatic 4.2CFM air operated vacuum pump with a vacuum capacity: 28.3 of Mercury at sea level @ 90 PS. With the capacity, it is a perfect choice for automotive air conditioners, home air conditioners, refrigerators and freezers. Safety Guarantee---75 PSI -180 PSI air pressure is required. Besides, the air vacuum pump is a AC pump that eliminates moisture from air conditioning systems, making it safe and easy to add refrigerant. Portable and Lightweight---The air operated vacuum pump is made up with PE plastic, which makes the vacuum pump is resistant to corrosion and light in weight. Also, the air operated vacuum pump has a handle, which makes it easy to carry. You can take it to anywhere. Customer Guarantee---After you placed the order, UPS will deliver the item to your place within 3 to 6 business days. If there is any quality problem or part missing of the items, please feel free to contact us and our professional service team will provide you with the satisfactory solution within 24 hours.