Mechanic 900M-T Oxygen-free Soldering Iron Tip for 936 937

Preservation method: Easy to clean, use the sponge to polish the surface. Please do not leave them exposed to the air, better wrap them with tin. Don't leave your iron tip running for hours and hours if you are not using it. This can make the tip get black oxide cover. (If you leave it on too long or run it too hot it will burn off the solder and go black.)