3" to 4" Flex to Rigid Duct Adapter

The intent was to replace the adapter I lost for my inline filtration system:

https://www.amazon.com/gp/product/B06XFRNPR8/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

The 3in end is meant for flexible hose inner dimension (I.D.) and has a small flange to prevent the duct from slipping off. I also made cuts, so when installing the hose you can flex the tabs to slide the duct on making it a tight fit. Snug it all up with a zip tie around the duct.

The 4in end is a fit for the outer diameter of the blower motor. Designed similarly to the 3in side. Snug it up with a clamp or zip tie.