A core for sample filaments to be uses on Bambulab master spool with AMS. Simply load the core on, pay attention to the notch in the spool, and load on the filament sample. plug the tail in a hole on the core, and screw the halves back together.
Core measures 59mm wide and 104 diameter.
Fusion360 and STEP files as well.
The author hasn't provided the model origin yet.