When you print an ARC case for your Bambu PIP, the top plexiglass knob is not round. This model is the round solution.

When you use this toolbox (https://www.printables.com/model/272099-bambu-lab-carbon-x1-with-ams-top-tool-storage) with the ARC P1P case you will need another knob to anchor the toolbox, this model accomplishes that. Secure with 3mm x 6mm button head hex screws.