We are supplying comprehensive raw materials for wleding consumables. The specs. of Magnesium powder is showed as below: Mg: 99% min C: 0.2% max P: 0.03% max S: 0.03% max Si: 0.05% max Fe : 0.02% max Size: -60mesh / -80mesh or at buyer's option Packing: In 150kg drum or at buyer's option