3 to choose from

1. No logo
2. Bambu Lab logo
3. Bambu Lab written out with logo

This was made to stop the failure to retract filament error when filament spool get low in the AMS. It helps to stop spools from jumping/binding when spool are low on filament as well.

Works with Bambu Lab, Flashforge, Kingroon, and Eryone spools. I'm sure it works with other brands but those are all Ive tested it with besides Sunlu.

For Sunlu spools I made an adapter for these weights that can be found here.

Depending on the thickness (it varies by brand), you can fit 6 to 8 AA batteries inside. I put my batteries inside a baggie and then place them inside. Then I twist the baggie closed and tie it off. I then use a toothpick to press the tied off excess down between the edge and the batteries. I do this for safety, just in case.