4. Si: <0. 2 mm Zn: <0. 1 mm Fe: <0. 2 mm 5. Size: 20- 40 mesh, 20- 80 mesh, 40- 80 mesh, 20- 100 mesh. We are able to supply 30000T Mg powder , 35000T Mg chips, 10000T Mg Alloy per year. Please reach us with your Detail ed requirements if you are regular buyer