The model file is downloaded on MyMiniFactory with your account — that's how their catalog works. Download it and attach it to your order: the studio will print it and quote a price.
The creator allows printing this model for personal use only: prints can't be sold. The studio will print it for you personally.
Creator's license: Creative Commons - Attribution - Noncommercial - ShareAlike
Creator's description
In my slicer (Slic3r) it works, but i'm not sure it if will work for others. if your slicer shows the bottom layer as solid (no hole to screw on) try cutting off the bottom few layers in your slicer I printed 2 shorter ones, one with a slight curve because why not the 2 example gray short ones were printed with .2mm layers and the pink one was .15mm the shorter ones don't print perfectly and sometimes you have to reload them in your slicer to make them print correctly, just print them in black and who the hell cares am I right?