This is a modular 3D scan marker system for taller objects or objects you place vertically in a vice/clamp to get more complete 360 degree scans.  If you want it taller, simply print more of the threaded rods and middle pieces and keep stacking.  You can unscrew and reconfigure these pieces as many times and ways as you want to build taller or shorter marker towers.  

The base is a solid 2" to prevent being knocked over and it uses a mixture of 3mm and 6mm scan markers (you have to buy them and place them), with recessed locations for all of them so they're perfectly placed.  I personally print in PETG and thus my 3MF is optimized for Elegoo PETG; however I do believe this site automatically changes it back to Bambu Lab defaults (which I cannot vouch for).  The standard model is about 7" tall, while the shorter model is about 3.5" tall.  Hope you enjoy!