I was a bit apprehensive about getting a good fit from my new filter, since the one it was to replace had no brand name. However, after checking with the original supplier, I was able to find what appeared to be the correct replacement. It was. Slid into the housing and fit snugly all around. Air flow feels better, as well, even though we switched from MERV 8 to MERV 11.
I love these filters.. Recently diagnosed with adult asthma and these filters keep my indoor air quality clean.. definitely can tell the difference !!! Ive recommended to many families with this new pandemic...