Keywords: Rosin Solder Paste, Soldering Effective Welding Grease, Soldering Wetting Agent Features: Rosin flux is used to facilitate soldering. It cleans and prevents metal oxidation, which allows solder to create strong, long-lasting mechanical and electrical bonds. It also acts as a wetting agent, increasing the flow of solder and the efficiency of the soldering process. Perfect for mobile phones, PC boards, and other sophisticated electronic chip-level flux welding. The best budget option to meet your needs. Description: Non-acidic, non-toxic, and lead-free. Long-lasting welding paste. Comes in a plastic box. Easy to carry, easy to use. Specifications: Color: Yellow Box Size: 6cm x 6cm x 2.2cm Package Includes: 1 x Welding Grease Note: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. The color of the actual items may slightly vary from the above images due to different computer screens, thanks for your understanding.