120mm fan to 4in dryer tube adapter

I needed a fume extractor for soldering and printing with tougher filaments but decided to just use what I have instead of shelling out for an expensive HEPA filter. This just serves to safely pipe the fumes outside the house and away from my lungs. Currently I'm just pointing the other end of the tube out the open window but I plan to design a better adapter so I can shut the window around it.

Printed without supports, 15% infill with Inland basic PLA. Ender 3 v2 with knockoff BLTouch, PEI build plate and dual Z