two big disk magnets;
two (or three?) small disk magnets;
3mm diameter axle pins
for the precompiled stl files these should work:
hight of both magnet types: 5mm
diameter of big magnet: 25mm
diameter of small magnet: 15mm
possible source:
https://www.magnet-shop.com/Neodymium-Magnets/Discmagnets/Discmagnet-%D8-250-x-50-mm-N50-Nickel-holds-86-kg::250.html
https://www.magnet-shop.com/Neodymium-Magnets/Discmagnets/Discmagnet-%D8-150-x-50-mm-N40-Nickel-holds-48-kg::48.html
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