We are supplying comprehensive raw materials of welding consumables. The specs of dead burned mageniste is showed as below:MgO (% min): 90.0 SiO2 (%):6.0 CaO (%):5.0 Al2O3 (% max) : 1.5 Fe2O3(% max):2.0 LOI (% max):1.0 SIZE: -80MESH/-120MESH or according to customer's requirement Packing: In 1000kg big bag or according to customer's requirement.