Flaired vent Hood

a small Flared vent hood for a 4 inch flexible air duct. I used this in a retractable Vent hood that can be lowered or raised when needed

The collar i used can be found here https://www.printables.com/model/1388240-collar-for-retractable-vent-hood
 

I used this hose clamp from Apok84 https://www.printables.com/model/1338893-100mm-4in-hose-clamp