PolyTerra Spool Flange
thingiverse
PolyTerra filament spool flange to improve stability for put on (not put through) filament spool holders. This improves unwinding as it improves the spool edge smoothness and stability. Simply put one on each side of the spool. No glue needed. You may want to add a clip or screw at the holes if it fits too loose.
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