ITEM NAME:BON-102 Flux Paste Solder Paste Brush Tip Pen Welding.Prevent flux evaporation, to ensure constant flux characteristics. BON-102 can be filled with flux pen, widely used in PCB soldering etc. 1 x BON-102 Solder Paste Flux Pen. Easy to operate, easy to carry, can repeat the filling flux such as the addition of alcohol, cleaning brush use.