https://alexnld.com/product/0-8mm-15g-63-37-tin-lead-rosin-core-solder-soldering-wire-line-flux-welding-reel/?hilite="0.5/0.6/0.8/1.0mm 63/37 FLUX 2.0% 45FT Tin Lead Tin Wire Melt Rosin Core Solder Soldering Wire Roll"