FM-2031 N2 Soldering Iron Handpiece / Conversion KitNITROGEN COMPATIBLE HEAVY DUTY SOLDERING IRON The Hakko FM 2031 Nitrogen compatible Soldering Iron provides a higher mass tip with double the power of conventional tips. This iron is ideal for soldering difficult to solder heavy ground planes and or high heat sink applications. The N2 gas and preheating effect have achieved significant improvement in soldering work! N2 soldering iron providing 140W high output. Please refer to the User Manual for