Pen Magnet attachment

A neodymium magnet attachment for a pen.
Doubles as a magic ring if you have tiny fingers (try it at your own risk, though)

Neodymium magnet dimensions: Ø 10 mm x 2.5 mm

Pen diameter: Ø 13 mm to Ø 13.3 mm

Print time: 21 minutes
Filament used: 0.36 meters of PLA

Estimated material cost (PLA): ~0,03 €
(Calculated from 200 m spool with a price of 17,99 € ≈ 0.08995 / m)