Air Conditioner Exhaust Hose Adapter

A ventilation/exhaust outlet mount adapter/coupler for Pro Klima and similar portable air conditioners. I have no idea of how common this connector is or if this kind of adapter fits other units, but I couldn't find a replacement part that would fit. Update from the future: I've now discovered that Mazercore made an adapter that resembles the original, so check out his model as well! The design principles are a bit different, but they serve the same purpose.
 

Air Conditioner Models I've Found To Be Compatible

Brand: Pro Klima
Bauhaus No: 2149996C
Model: JHS-A016-09KR2/A

Other units I've seen with the same connector:

Brand: Domair
Ref: Arctic
Model: JHS-A019-07KR2/B

Brand: Iiglo
Model: IIAC7000W

Notes 

• Blender project and STL is included
• Designed to be printed without any supports
• The model is by no means perfect; it has minor errors (non-flat surfaces and so on), but Prusa Slicer fixes them all without issue, so I've been too lazy to fix them ;) Better upload the darn model rather than delay indefinitely because of imperfections.
• The outer diameter for the hose is 128mm (12.8cm, ~5 inches) with the inner diameter being about 121mm (12.1cm, ~4.76 inches).