This is a weight holder for spools. It is intended to be used in the BambuLab AMS. When the spools get low on filament they sometimes lift up when filament is being pulled from them. With this inserted it helps the spools roll as intended. The main body is hollow and you should insert a pause at 66.4mm and insert the 500g weight. The pause height might change slightly depending on the layer height you print it at. The weight I used is this one: https://www.amazon.com/gp/product/B08GC3958M/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I printed these at 0.2mm layer height and no supports.

Update: I uploaded new files with 0.1mm and 0.2mm of clearance between the threads.

Update 2: I created a new three part model that does not need to be paused. https://makerworld.com/en/models/104168#profileId-111237