Good quality product and great value.
I have been a user of pleated AC filters for 24 years and the Atomic Filters are great as well as economical. I did notice the 20 X 20 X 1 are smaller by almost a half inch (19.5" compared to 19 15/16th" of the usual filters that I have used). This small Gap allows the filter to spring forward when the AC is not currently in operation. Atomic may want to add the extra width so that the filters stay in place at ALL times. The life of any AC unit is keeping the coils and corresponding parts Debris-Free of foreign particulates .. i.e. Dust, Grime, and environmental contaminants.
The Atomic Filters are of Great Quality and perform Effectively. However, the small size creates issue with filters falling down in the filter housing when "Static Pressure" is released.
Filters look good and perform well. Shipping took two weeks
Excellent delivery time. Product as expected