ARKSEN Electric 4CFM 2-Stage Pump Rotary Vane Deep Air Conditioner Vacuum HVAC 1/3HP w/ (2) Free Oil Bottle Quickly and effectively removes moisture and air arom air conditioning system Lightweight cast aluminum construction for maximum durability Direct drive motor allowing easy starting and is maintenance free Oil viewing windows allows you to monitor oil quality and levels Free Air Displacement: 4 CFM (114L/Min); Inlet Port: 1/4" Flare & 3/8" Flare