Are you looking for a basic tool that is unleaded solder? (By unleaded I mean Pb-free), we’ve got this here for you. Soldering is 60/40 as being not cleaned. and note that it’s actually water soluble resin core,
2.5% flux, 0.031" gauge and 15 grams.
Mix: 96.5% tin / 3.0% silver / 0.5% copper