AC duct window adapter

Made this simple air conditioner duct for a flat roof window, but it should also work for others.

It is made for 150mm flexible ducts and the square opening is 210mm by 70mm (inner measurements) with a 3.2mm wide and 1.2mm thick brim.

I also uploaded the FreeCAD file for anyone, who wants to change sizes to their likings.

It just barely fits the Ultimaker2+ so you probably need to split it for smaller printers.