Aluminium 4043 x 1.6mm TIG rods in 2.5KG pack....... 5% silicon alloy, conforming to BS 2901: 4043A........ Suitable for the welding of most commercial grades of aluminium, where maximum strength is not a priority....... Sheet, cast and wrought aluminium....... Do not use if the end product has to be anodised, as the weld area will discolour........ Can be used for oxy-fuel gas welding, with a suitable flux.......[Also available in 2.4mm and 3.2mm]