1.specification:-80 mesh (size <0.180mm) 2.Purity: 99.5%+ 3.Loose thickness:0.1-0.75g/cm3 4.Liaoyang Guoxing Magnesium Powder 5.We are manufacturers who sell magnesium powder,passivated spherical magnesium powder,magnesium chips,magnesium butt ends,Black SiC Ball and so on. 6. ISO9001:2000 International Quality Control System Authentication.