Nothing that I am aware of .I don't have the package that it came in to verify it.Hope that helps you out
In most residential HVAC the filter should last up to 90 days.
1 inch. 16x25x1 is the complete description of the filter.
Honeywell air filter are produced in the US and Mexico.
There are 12 filters in a carton. But you can order any quantity on-line at homedeport.com
It is rated 13