Replacement Single Flat Soldering Tip for the Weller WLBU75 Cordless Butane Soldering Iron. Helps deliver heat to solder joints on PCBs and can also be used for general soldering tasks. Join wires (>8AWG), micro-electronics, drones, small appliances, model railroads, audio components, electronic repair, automotive, marine, hobby kits and crafts. The tip is easy to change by pulling the old tip off then pushing the new tip on (turn off soldering iron and allow the tip to cool before removal).