Mini Toilet Roll filament spool ,for using 1.75mm filament samples

thingiverse

A small spool end that slips perfectly into the cardboard tube in the center of a toilet roll. Built for filament samples up to 20 meters long. Best suited for flexible filament types. Instructions Cut the cardboard tube from a toilet roll lengthwise. Print two identical pieces, pop one into each end of the tube, then spool your filament sample onto it. Returning from the TCT show, I had accumulated many filament samples. The rest is easily understood without further explanation. I chose not to make the fit overly tight. You might want to apply a drop of glue to keep the ends in place if needed. These specific designs were printed at 0.3mm - the base is merely 1mm thick, which explains the somewhat rough appearance.