1、Iron box high grade flux. 2、Rosin High purity rosin. 3、Excellent quality solder paste. 4、Small smoke, high purity, no impurities. 5、Suitable for mobile computer maintenance. Features: 1. Iron box high grade flux. 2. Rosin High purity rosin. 3. Excellent quality solder paste. 4. Small smoke, high purity, no impurities. 5. Suitable for mobile computer maintenance. Specifications: Model: UV50 Color: Yellow Viscosity: 0.2PaS Granularity: 0.22um Capacity: about 30 g Size: Approx. 50*50*12MM/ 1.97* 1.97* 0.47in Package List: 1 * Rosin Solder Paste Instructions: 1. Wipe the surface of the object before soldering. 2. Apply the paste flux to the solder joint. 3. Solder the tin to the solder joint with soldering iron. Advanced Paste Flux Soldering for mobile phone motherboard Repair. Electric Soldering Iron Welding Fluxes for phone circuit board repair. High bond strength. PH value neutral, insulation is strong, welding surface smooth IC and PCB for no corrosive. Its boiling point is only slightly higher than the melting point of the solder. For mobile phones, PC cards and other sophisticated electronic chip-level help welding