The file 'Lego Compatible Brick Magnet 3D Printer Model' is (stl) file type, size is 61.7KB.
Die runden Magnete "18 mm x 5 mm" findet man auf Amazon:
https://www.amazon.de/gp/product/B07L7XK1N3/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
magnet-Cut.stl | 288.8KB |