... cystosepiment: 2 Thick cardboard: Rotary Vane Vacuum Pump is suitable for refrigeration, electronic light bulb industry, printing, pharmacy, foodpackaging, ... the container, get the air out make it for vacuum, inparticular for refrigeration repair(refrigerant such as R12/R22/R134a ... rubber feet, it can reducing the vibration noise.III. Instructions for Useful1. Please remove the air vent cap before using ...