... and date even the source materials are kept for investigation.Product Name: Aluminum welding wires&rodsFeatures: 1050/1060/1070/1100: The products ... :1.6mm,2.0mm,2.4mm,3.2mm,4.0mmER1070: 1.6mm,2.0mm,2.4mm,3.2mm,4.0mmER1100: 1.6mm,2.0mm,2.4mm,3.2mm,4 ... ;6-7kg/spool;2kg/spool;0.45kg/spool Aluminum alloy welding wire & rod