Magnetic Fidget
thingiverse
I don't particularly enjoy fidgeting, but a lot of close friends love/need to, so I enjoy making fidgets for them. Make sure to print the button and body at 105% and the cap at 103% size, since I modelled them wrong and they'll fit your 18 mm (0.71 freedom units) magnets just fine. This fidget works by gluing one 18mm magnet to the inside bottom of the base and one on the button to repel each other.
Download Model from thingiverse
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