Product review (5 stars): Exactly Perfect
Getting replacement filters for humidifiers is always a pain in the rear... honestly I think a lot of people will buy a new humidifier before they'll try to find replacement filters for the one they own. It's just one of those things.

So I bought a two pack of these filters, from this vendor (The "Buy-it-now" store) for my Duracraft AC-109 humidifier. They weren't super quick getting delivered, but quick enough. The packaging is adequate, not a lot to say about it really.

As far as actually using the filters, they are a completely perfect drop-in replacement for stock filters, and they seem to do their thing really well. For this price, I have no problem at all recommending these filters to anyone. I'm happy!