A spot for sticking a label (or writing directly) on to vertically store spools. The flat part is suitable for 1.5-inch x 1-inch labels.

I got inspired by another model (https://makerworld.com/en/models/1141190), but I didn’t like the way it was connected, nor did I like that it prevented the spool from lying flat.

The strength of this model is slightly inferior (the pins might break if force is applied), but I have installed and removed it multiple times with no issues. The default print configuration includes a skirt, but I have also printed several versions without one. Therefore, you can omit them at your own risk. Regular PLA works well, but other materials will provide greater durability.