ZENY Combo Air Vacuum Pump HVAC Refrigeration AC Manifold Gauge Set R134a Kit (4CFM + Manifold Gauge) High Efficiency and Low Noise, Heavy-duty Aluminum Alloy Casing Oil Drain Plug Positioned at Bottom of Oil Reservoir,Internal High Volume Cooling Fan for Extended U Exhaust Port with Exhaust Cap, Direct Drive Motor Allowing Easy Starting Which is Maintenance Free Oil Sight Glass For Monitoring Oil Levels, ON/OFF Switch Non Slip Cushion Handle, Comes With a Bottle of Vacuum Oil