This is a snap on spool card mount. It's designed to hold dry erase cards that can be updated regularly.

Originally I started weighing my spools to get a rough estimate of what I had left. After that I started writing down the filament usage from BambuStudio on a sheet of paper, but found it error prone.

This snap on card mount solves this issue for me. The card holder is sized to hold 63mm x 88mm dry erase cards. I had these on hand for making MTG tokens, and they work perfectly for keeping track of my filament usage and any other notes I could ever need. This could also work with paper / card-stock trimmed down to the 63mm x 88mm size.

These work on both original and updated Bambu Refillable Spools.

The holes in the spool must run in the same orientation as the mounting pins.