The Hakko 908-CK Conversion Kit converts any Hakko 907 Soldering Iron that uses medium mass (900M) tips into a Hakko 908 Soldering Iron that uses large mass (900L) tips.
Conversion Kit comes with:
900L-T-3.2D Large Mass Tip
B1787 Enclosure
B1794 Enclosure Nut
B2033 Nipple