TOOGOO(R) Tin Lead Solder Core Flux Soldering Welding Solder Wire Spool Reel 0.8mm 63/37 Wire diameter: 0.8mm 63/37 rosin core solder Good solderability, insulation resistance, No spattering and Non-corrosive. Widely used in electrical and electronics, solder parts like circuit board, electronics devices 100% Brand new and high quality