Filament Clip
thingiverse
Here is a filament clip that works well with several different manufacturer's reels of 1.75 mm filament. I've provided the FreeCAD source file for this filament clip, to make it easy for anyone to customize it. You can change the filament radius, the gap between the ears and their length, etc.
Download Model from thingiverse
With this file you will be able to print Filament Clip with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Filament Clip.