Spool Holder End Caps
thingiverse
A couple of what I'm calling 'end caps' for standard 1kg PLA spools so they sit better on the standard spool holder and give a smoother feed. Outside diameter is 57mm, inside diameter for centre hole is 18mm. If you find the fit inside the spool a little loose, put some tape around the circumference of the cap to make it fit tighter.
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