6FLUX PASTE RL-420S-UV Configure needles and. Needle + push rod for easier to use. Running tin is fast and has less smoke No-clean, easy to tin, no residue Applicable to mobile phone PCB, BGA and PGA repair Configure needles and Needle + push rod for easier to use. Suitable for sensor, wire, SMT repair, circuit welding, tablet phone computer repair, home appliance repair, etc. Running tin is fast and has less smoke. No-clean, easy to tin, no residue. Active ingredients, improve fluidity, easier to tin