Parametric 6" to 5" duct adapter for portable ac

I have 5" vents in my walls for a Portable AC
My Portable AC has 6" ducts

This creates a 6" to 5" adapter that reverse threads over the 6" duct and connects to a 5" vent.

Fully customizable in openscad.
Remixed from summetj vacuum hose adapter scad