the welding wire is useing the advanced Electroplating copper coated technology! 1) Available in all sizes, 0.6mm-2.4mm with suitable high grade pure flux used for saw pipe welding and all other heavy structural steel fabrication and steel welding 2) Moisture-proof air tight, packed in 5kg/12.5kg/13.5kg/15kg plastic spool for extensive use and export Packing: 5kg/12.5kg/13.5kg/15kg per spool