... 4,Low MeltingSolder 2012 hot sellingRosin Plux PEN for DIY Solar cells Panels, for electrical soldering,soldering pen,Plux pen Feature: ... Designs for easier soldering of tab wire to solar cells. Superior fluxing ... Contents: 10ml 2012 hot sellingRosin Flux PEN for DIY Solar cells Panels, for electrical soldering,soldering pen,Plux pen