FreeSmall Roller Friendly Filament Spool (up to 200G) - with and without inner hole.
Printables
16 model
Free
FreeTOES: Totally overengineered sample spool & spool holder
Printables
FreeGiant Spacer / Washer for Adjustable Spool Holder for Silica Gel / Spool Weight
Printables
FreeSample Coil Master Spool (Magnetic)
Printables
FreeSample Filament Spool Holder for small and medium winding
Printables
FreeSample Spool (Makerbox etc 120mm coils)
Thingiverse
FreeSample Spool to Full-Size Adaptor/Converter
Printables
FreeExpandable Sample Spool holder
Printables
FreeSimple sample spool holder
Thingiverse
FreeMini Spool for sample filament
Thingiverse
FreeMini Filament Sample Spool
Thingiverse
FreeProto-Pasta Subscription Sample Spool
Thingiverse
FreeMaker Box Filament Sample Spool
Thingiverse
FreePrint In Place Adjustable Filament Sample Spool
Thingiverse
FreeExtended Unlockable Loose Filament Spool (Push Plastic Sample)
Thingiverse
FreeSpool Adapter CFS 250g
MyMiniFactory