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18 model
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FreeCardboard Spool Reuse Clips – Elegoo Compatible - Second Life
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FreeReusable spring for Universal Auto-Rewind Spool Holder
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FreeReusable Spool directly usable in Filament Switcher (no need for the centering disks)
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FreeReusable Spool for Overture Refill
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FreeReusable Flosser with Spool V2
Thingiverse
FreeReusable spool holder with cardboard parts
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FreeSlantSpool Reusable Filament Spool
Thingiverse
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Thingiverse
FreePolymaker Reusable Spool for 25mm RFID Tags
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FreeFilaron Reusable Spool
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FreeFaster Cheaper Polymaker Reusable Spool
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FreeBambu Lab Reusable Spool Remix Four
Thingiverse
FreeECOrefill Spool (Reusable Filament Spool)
Thingiverse
FreeSpool
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FreeUniversal Refill Spool Adapter for eSun Cardboard Spools (78–92mm)
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FreeFilament Refill Spool – 82 mm Core
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