Anti Slip TPU Roller add-on for Filament Dryer

These are a remix of the roller for the Filament Dryer made by AP Engineering. I found out that the rollers were not round, so the spool wouldn't roll well. These anti-slip add-ons make the spool grip better to the rollers and actually roll when the printer is pulling out the filament.

You need to print it with TPU ! I used Esun TPU 85a and it worked well !