Used for drying 4x5 Harman Direct Positive paper for use with my Pinsta pinhole camera. They also make nice fridge frames.
Print in PLA 15% infill .
I used 10x3mm black magnets. I have included the .step file to modify to the magnet size you have on hand.
10x3mm Magnets I used,
afflink: https://amzn.to/3q0trIl
The author marked this model as their own original creation.