HTS-2000 Extra Alloy Rods (pack of 5). The latest technology in joining aluminium, cast aluminium, pot metal, copper, magnesium, and all white or porous metals is here. This second-generation rod gives a stronger join and is simpler to use. It also easily penetrates past impurities that lay below the metal\'s surface, which may be impossible to penetrate with previous rods. Also unlike the first generation rods it does not require steel or special cleaning brushes. Ideal for aluminium heads, bell housings and sumps.