About this 3D model
For the magnet version, I use 2x N52 Neodym Magnet size 2mmx6mm. After printing, just add 2 magnets to the holes and glue both halves together. There are 2 other versions, which are “just” multicolor, but without magnets. One has a ring, but besides that is the same. They are AMS ready, oriented correctly and color is assigned, but you can change it of course at any time.