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Vacuum Packaging and food safety --- Vacuum packaging extends the life of foods by removing most of the air from sealed containers and prevents fresh air escaping into the sealed containers, thereby reducing oxidation. Vacuum packaging helps preserve flavor and overall quality.It also helps inhibit the growth of aerobic microorganisms, which can lead to the problems noted below under certain conditions:Mould - Mould cannot grow in a low oxygen environment; therefore vacuum packaging can virtually eliminate it. Yeast - Results in fermentation, which can be identified by smell and taste. Yeast needs water, sugar and a moderate temperature to grow. It can also survive with or without air. Slowing the growth of yeast requires refrigeration, while freezing stops it completely.Bacteria - Results in an unpleasant odor, discoloration and/or soft or slimy texture. Under the right conditions, clostridium botulinum(the organism that causes Botulism) can grow without air and cannot be detected by smell or taste. Although it is extremely rare, it can be very dangerous.Specifications:Material: ABS(Acrylonitrile Butadiene Styrene plastic)Color: BlackRated voltage: AC 110V-120V/60Hz 220V-240V/50HzPower: 90WVacuum Degree: -45Kpa/-60KpaDimensions (L x W x H): 37x7x5.2cm/14.6"x2.7"x2.1"Weight: 600gVacuum bags size: 25x20cm / 9.84"x7.87"Packaged Included: 1 x Vacuum Sealer, 12 x Vacuum bags, 1 x Charger Cable, 1 x User Manual