* For aluminium wire, we recommend using one tip size larger than the aluminium wire size used. This allows for the extra heat expansion you get with aluminium. Ex for 0.8mm aluminium use a 0.9mm tip, for 1.0mm aluminium use a 1.0mmAL tip which is 1.1mm.
** For high-heat flux-core welding, we also recommend moving up a tip size as per the above.