1、Resistance to freezing, can withstand the temperature change and hot 2、Refreshing keeping time, keep the smell, safety 3、Green environmental protection, you can cut off the mouth of the sealed bag, clean and reuse 4、Can be used for vacuum packaging, aseptic packaging 5、Grain bag is a side pressure lines, the other side of the slick professional vacuum bag, suitable for all vacuum chamber at home and abroad, the principle of automatic vacuum packaging machine