Fahkns 3Cfm Rotary Vane Vacuum Pump 110V For Hvac/Auto Ac, Medical Or Milking 3 CFM Vacuum Pump: FAHKNS vacuum pump adopts a direct-connected motor structure, which makes the structure more compact, smaller in size, lighter in weight and easy to carry.Suit for those who are looking to self diagnose or recharging AC systems; It maintains air conditioning systems by efficient removing moisture before refilling the refrigerant Anti-returning Oil Design: The inlet channel is specially designed to prevent the pump oil from flowing back and polluting the pumped container and pipeline after stopping the pump,With 1/4"Inlet Port, the maximum capacity of the pump is 200ML, and we will offer a bottle of 220ml vacuum pump oil as a test. All Copper Motor: All-copper movement is better than aluminum wire, the vacuum pump has a longer service life and faster running speed. Strong copper motor makes the machine vacuum, to ensure stable operation of the machine, energy saving and power saving Powerful Features:Strong heat dissipation, low noise, strong power, anti-reflux Forced Cooling: The wind page at the end of the machine intervenes to reduce the heat generated when the machine is running, ensuring the smooth operation of the machine and making the machine last longer