Product review (1 stars): the "front" of this filter looks like the front of the 41F
You can see right through this "screen" and it is incapable of effectively filtering anything out of the air passing through it As you can read in other reviews, this is NOT the Broan / NuTone 41F filter that is unfortunately way overpriced at $18 and available through Home Depot and Lowes as well as Amazon. At a glance, the "front" of this filter looks like the front of the 41F, but the similarity stops there. The true 41F (NOT this item) has a dense fibrous backing that seems to do most of the heavy duty filtering after a quick pass through the front layer of fairly loosely woven carbon coated fibers. This $8 knock-off ONLY has the loosely woven presumably carbon coated layer. There is no backing. You can see right through it. I've been using the 41F filters for 8 years and thought I'd try this look-alike to save a few bucks, but you do get what you pay for. If you value clean air and less cooking residue floating through your home, skip this filter.