Solder Iron or element surface oxidation,not easy adhesion of tin and the next welding, with rosin can quickly remove oxidation,making components more easily by welding, the effect is obvious Specifications: Material:Natural resin Viscosity: 100(Pa·S) Granularity: 50(um) Melting point: 125 ℃ Neutral PH 7土0.3 Features: 100% New Brand and High Quality Fluxing excellent results,joint high intensity Good insulation No corrosion,IC and PCB for no corrosive Smooth welding surface No deterioration and no dry Package includes:1 x Rosin