... is made of high quality cold rolled steel strip, lastly, tightly closing the wire, so a multiple material(cored wire) with certain length ... -Fe (B20) cored wire, CaSi cored wire, CaFe cored wire, FeMnC2,0 cored wire,FeSi75 cored wire,Graphite (carbon) cored wire, Mn cored wire, Pure calcium cored ...