This Vacuum packaging machine is used for vacuum packaging with packaging materials having a extremely high gas barrier for the purpose of food preservation. Most of these machines seal the bag containing food in the vacuum chamber. The four types of machines are classified by mechanical faculty: nozzle, chamber, skin, and deep-draw type. Vacuum packaging is an alternative natural preservation packaging technique that can extend the shelf life and improve the overall quality of muscle foods (Sahoo &Kumar, 2005). http://www.willingappliances.com/vacuum-sealer/vacuum-packing-machine/