Product review (1 stars): False advertising. Not a 5" duct.
If I could give zero stars, I would. Ordered a 5" received a standard 4" duct. What good does that do me???? Now, when I need it most, I have no way of connecting my portable air conditioner to it. I'm beyond discouraged. THATS FALSE ADVERTISING and its too late for me to return!!!!!! I'm about done ordering from Amazon.