Variable diameter spool/Detachable filament spool

When filament is almost used up, oversized spools take up too much space.This variable diameter spool solves this problem perfectly.When the filament is almost used up, you just need to remove the outer ring to turn the filament spool into a mini filament spool, freeing up more storage space. It can still be used in AMS lite or as an external spool. If you need to use it with AMS or AMS2, simply reattach the outer ring. Features1 Dimensions are compatible with Bambu Lab devices.2 Mini spools can share outer rings, saving printing material and storage space.3 Mini spools have a recessed design, so the filament does not protrude, making spools easy to stack.4 The inner side of the outer ring has a slot to secure the filament end, requiring no extra device and not protruding to affect stacking. Tips· If the ambient temperature is high, or the drying temperature is high, it is recommended to print with more heat-resistant materials such as PETG.· When a regular spool's filament is almo