A flux-cored solder wire made from SN100e, a lead-free alloy consisting of 99.5% tin, 0.5% copper and a trace of cobalt. The NC601E flux is a colophony-free, no-clean type that leaves virtually no post-soldering residue for a visibly clean solder connection. * Melting temperature 228°C * Flux content 2.2% * Flux conforms to J-STD-004 / J-STD-006 * Virtually no residue * Traces of residue can be dry brushed away for even cleaner appearance * 0.8mm diameter (21SWG) * Supplied on 500g reels