Easy to use fresh keeping time, keep the smell, safety resistance to freezing, can withstand the temperature change and hot green environmental protection, you can cut off the mouth of the sealed bag, clean and reuse can be used for vacuum packaging, aseptic packaging, grain bag is a side pressure lines, the other side of the smooth professional vacuum bag, suitable for all vacuum chamber at home and abroad, the principle of automatic vacuum vacuum packaging machine. Freezable, reusable microwave safe. 80-85 microns.