This Core is to be used with a Bambu spool to make it easy to get a clean perfect start every time you are using a re spooling winder. It holds tight until the spool is low and then it lets go just fine so there is not a hang up or a clog at the end of a roll.

How to use:

Just put the core on your spool, lock the spool shut then shove filament tip in the hole and re-spool turning in the direction of the arrow on the Core