ARKSEN 2-Stage Deep Vacuum Pump 1/2HP, 5CFM Refrigerant 1/4" & 3/8", R410a R134 HVAC, w/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 Air conditioning maintenance but can also be used for vacuum sealing jars for preserving food, degasification, hot-forming plastic, chemistry and stabilizing wood Free Air Displacement: 5 CFM (142L/Min)