Oil Drain Plug Positioned at Bottom of Oil Reservoir. 110V 60Hz 1/3hp Motor 4 CFM Single Stage Rotary Vane Vacuum Pump High Efficiency & Low Noise With Internal High Volume Cooling Fan for Extended Use Heavy Duty Aluminum Alloy Casing Oil Drain Plug Positioned at Bottom of Oil Reservoir. Blue gauge (low): 2-1/2" diameter, 0-500 PSI Red gauge (high): 2-1/2" diameter, 0-800 PSI Includes 3 color-coded Hoses 43 Long (Red Hose Burst Pressure 4000PSI/MAX working Pressure 800PSI; Blue/Yellow Hose Burst Pressure 3000PSI/MAX working Pressure 600PSI) Ideal for R410A, R134A, R12, R22, R404Z etc.