Check the listing for details. T12-D4 Soldering Iron Tips 4mm Chisel Width Solder Welding Replacement Tip. Condition: New. Listed at 16.33 USD. The soldering iron tips feature an imported oxygen-free copper core for excellent heat conduction and rapid heating. The exterior is nickel-plated, offering corrosion and wear resistance, which extends the lifespan of the soldering tip. It also enhances the thermal conductivity of the tip.Flat edge soldering iron tips provide a larger contact surface, enabling faster heat conduction, even heat distribution, and effective coverage, thereby enhancing soldering efficiency. They are also suitable for removing excess solder in the soldering area.Flat edge soldering iron tips precisely control the soldering position, thereby enhancing soldering accuracy. They are easy to clean and maintain, and the soldering tip can be quickly replaced, extending the tool's lifespan and enhancing efficiency.