This just fills the inside of the cardboard spool bore so it'll roll smoothly across a spool holder that goes through the middle. I use ASA, but almost any filament would be fine for this since it's a low stress part. The design is dimensioned to be made with a .6mm nozzle, .8-.9mm wide perimeters, and .28mm layer height. An internal brim is good but probably not necessary.
PolyMakerSpoolAdapterV2.3mf | 463.0KB | |
PolyMakerSpoolAdapterV2.obj | 3.7MB | |
PolyMakerSpoolAdapterV2.stl | 1.6MB |