Product review (1 stars): Does not fit as advertised
Well I see many reviews like mine. 3inches to short My model is a Essick MA0800 needs MAF-2 Amazon site claims to fit as well as does the box. It Doesn't.
I added a piece of aluminum foil to close off the Grand Canyon sized gap. It will work.

The only upside to this filter for what it will fit is has a wire mesh to help support the fragile filter.

Not much else to say everyone else hasn't.