A Round Ant Nest made in Blender.
It is resizeable pretty well, on my reference picture it had a diameter of around 5cm as i printed it for a 10mm innerDiam. Hose
Magnets should fit also quite well in the screwholes, if they are to small, just fill up the hole first with hot glue, and if they are to big, dont be shy drilling the hole a bit wider. Designed with Inspiration and printed with PLA.
Greetings JustDangel :^)