Product review (1 stars): terrible design sorry if you have no choice.
May god help you if you have this filter type AC unit and need to replace.  The worst designed filter I have ever seen.  What a disaster.  100% difficult to install.  Still not installed completely right.  Total POS.  Terrible design.  Not good for the do it yourself small timer.  Not only not installed right and easy, but got on my arms and it caused rash.