This design replicates the cardboard sleeve which comes with a BBL filament refill. This is needed if respooling to printed Bambu Lab spools or to Bambu Lab spools where the cardboard sleeve is not available.

3mf files are included that were used for PLA and ASA filaments in a Bambu Lab X1C Carbon printer.

UPDATE Version V4:

Reduced the length of the notch and added more filament holes for convenience.