Product Description: 
100% Brand new and high quality!!
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 cards and other sophisticated electronic chip-level flux welding.
Specifications:
Product:BST-21503A
Melting point:60℃
Weight: 150g/pc