CFHKStore 1mm Solder Wire Reel 100g Pretty Delicate 63/37 rosin core solder. FLUX 2.0%. wire diameter: 1mm. Melting point: 361F/183C Good solderability, insulation resistance, No spattering and Non-corrosive Widely used in electrical and electronics, solder parts like circuit board, electronics devices and others. Size : 5.5cm x 2.8cm.