1.ISO9001:2000 2.40-60mesh 3. with stable chemical property 4.have some chloride things and Oxide things on surface Liaoning Guoxing Metal Material Co., LTD, is professional produce all kind of magnesium products. eg magnesium poweder , magnesium ingot, magnesium ingot end,passivated magnesium powder,Magnesium shavings,etc.Customers are welcome to call us or write me e-mail, your satisfaction is ...