Mount and cover for a filament runout sensor switch. It can be screwed above the 3D printer (on the IKEA LACK table surface or other). Filament tube goes through both sides (and through the table surface) for a smooth filament feed.

@ Here is how you can modify any STL files easily, using Tinkercad: https://www.youtube.com/watch?v=JZXR5rOJ_QM

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This is a remix from https://www.thingiverse.com/thing:3052714