Magnetic Yes/No marker
thingiverse
Just a simple two-sided marker tag, 4 disc magnets can be added mid-print. Photo shows markers with color swapped twice (at 1mm and 3mm). The provided stl file is configured for 6x3mm disc magnets and also works very well with 6x2mm and 6x1mm (the magnets will slide). 1mm magnets hold the tag nicely, but if you want to hold up a piece of paper with it probably 2mm magnets are necessary.
Download Model from thingiverse
With this file you will be able to print Magnetic Yes/No marker 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 Magnetic Yes/No marker.