Cardboard Spool Insert Adapter

This insert for cardboard spools reduces friction and cardboard dust while printing and protects the cardboard.

Low material: only 5 Grams of filament
 

Diameters: (of the surface contacting the spool from the inside)

- 55.5mm (PolyTerra)
- 56.65mm (Filafarm)

Scale in PrusaSlicer for custom diameter
 

Filament:
Any

If printed with the same filament that's on the spool it also serves as a color sample ;)