Feature●[Application]: This Flux pen pen, mainly used for revision and touching-up SMT, SMD, PCB and solder joints through the hole.●Low solids: low solids content for almost no residue, no-clean.●[Superior fluxing ability]: Flux flows smoothly for consistently safe and uniform solder joints with no mess, greatly improves soldering performance.●Rosin Flux Pen Pen: The rosin residue is non-corrosive, non-conductive, moisture-resistant, and fungal resistant.●[Lead-free]: lead-free, no-clean.Description