GALLUNOPTIMAL mini brass wool desoldering sponge for cleaning soldering tips, approx. 35mm diameter, 12g in a polybag

Due to the increased oxide formation during lead-free soldering, it is recommended to clean soldering tips after use to extend their lifespan.
A dry sponge has the advantage that the soldering tip is not exposed to a rapid temperature drop as with a wet sponge. This prevents microcracks on the soldering tip surface, which also leads to a longer soldering tip life.