Snap-In Label Chip for SUNLU Reusable Spools

Snaps into the holes and groove at the outside edge by the cutout on this particular type of SUNLU reusable spool.  I use it to label the spool with the brand and type of filament I'm loading on it.

Works on spools that look like this:

If your spool looks like the one below, you might want Reusable NFC Tag Clip for Sunlu Filament Spools (Anycubic ACE Compatible) by @Xitara_2530492.