Yaufey Single-Stage Rotary Vane Vacuum Pump 3CFM,1/4HP,220ml,5pa for HVAC/Auto AC Refrigerant Recharging,Wine Degassing(R134,R12,R22,R502),Medical with Manifold Gauge Set Efficient evacuationHigh Efficiency and Low NoiseHeavy-duty Aluminum Alloy Casing ConvenientOil Drain Plug Positioned at Bottom of Oil Reservoir Long Life UseLightweight, Durable Construction for Easy Handling Fast Design SystemFast Design Removes Moisture & Non-Condensable Gases that can Destroy any A/C Refrigeration System Exhaust Port with Exhaust CapDirect Drive Motor Allowing Easy Starting Which is Maintenance Free