... iron and oxygen. It will absorb the oxygen in the food package in order to lengthen the food’s preserving periodThe ... keeps the foods from oxidation, mildew and rust by absorbing the oxygen in the container. It is suitable not only ... tea, seaweed, dry vegetable, coffee4)Get rid of pest, rust.Precision parts, clothes, furry, Painting and calligraphy, precious metals, pharmaceuticalsHowever, for ...