ARKSEN HVAC A/C Refrigeration R134a Manifold Gauge with 3CFM 1/3HP Vacuum Pump Oil viewing windows allows you to monitor oil quality and levels Built-in high volume cooling fan for extended use Hose Connectors: 1/4" SAE, Gauge Reading: R134a Manifold r134a: Quick disconnect couplers for high/low fittings included Free Air Displacement: 3 CFM, Power: 1/3HP, Pump Speed: 1720 RPM, Voltage 110V @ 60hz