Solder Wire - 60/40 Rosin Core - 0.5mm/0.02" diameter - 50 grams
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If you want to make a kit you'll need some solder. This 0.1 lb (about 50 grams) spool is a good amount, not too much (like 1 lb spools) and not too little (like those little 'pocket clip' vials).
This spool of solder contains approximately 0.6mm / .02" diameter in with lead-tin formulation. This is not lead-free solder, so not for lead-free/RoHS shops. However, for kit builders, it's a joy to use, much easier than lead-free, and great for beginners. For flux, it contains a 'no clean' rosin core. This diameter solder is best for any SMT/fine-pitch work as it allows you to deposit small amounts of solder.
This is "60/40" leaded solder with 37% Pb (Lead), 63% Sn (Tin) and trace Ag (Silver), Cu (Copper). Even though this is not truly 60/40, it is close enough for us to consider it a replacement.