Double Layer 4 Inch Duct Filter

This will keep out larger bugs, but there is no part of this that is a particulate filter. Very cheaply made.

I have suspicion bugs are getting into my basement through a vent, helpfully in the summer I'll find out it works. I wish it fit snugger, probably my fault though.

A little flimsy but does a decent job for intake filtration

Works great on my 2nd one now, first one lasted over 8months of none stop use.

It seems to be a nice little filter.

Nothing about this filter says it will last. It's just cheap. In price and quality.

What was expected

they feel good and thick and heavy duty