Spool for Bambu Labs filament refills with external diameter reduced to be printable on an A1 MINI. The internal diameter is unchanged.
This spool may not work on Bambu Labs large AMS and other rim roller type filament holders.
The photo shows the difference between the full size and this reduced size.
The author remixed this model.
Reduced outer diameter to be printed in an Bambu Labs A1 mini while still large enough to hold a refill.