ITEM NAME:Electroplax Soldering Flux Soldering Solar Panel Cell PCB board Rosin-Flux â„–[ Description: Product Name: Rosin Flux Pen Size:14cm Application: Solar Cell Tabbing Wiring and Bus Wiring PCB board soldering Electrical repairing Many other soldering use Educational kit Package Included:.1PCS Rosin Flux Pen. PCB board soldering. Many other soldering use. Solar Cell Tabbing Wiring and Bus Wiring.