Holds tight to the vent very happy with my purchase

just what I needed

Love these. Live on 10.5 acres and this has stopped the mice from coming up the vents of our newly built home.

Arrived quickly easy to attach to vent ( magnet) don’t know how much they filter yet but they look nice pleased with purchase

Before purchasing, I read all of the reviews, not only on Wayfair but a lot of other websites that sell this product. The reviews had mixed opinions, so I decided to go ahead and order them and re-engineer the way I use them. In instructions, it says to place on top of the vent, however, I put it under the vent, I was able to remove one of the magnetic strips at the end and trim it to size to fit inside it didn’t take much trim me less than a fourth of an inch and then I re-glued the magnetic strip back on let it dry and popped it in now all I have to do is pick my bin up. Take it outside. Remove the magnetic screen shake it off and pop it back in place they have been working great that way and I’m glad I thought of doing it that way because I have a golden retriever and they shed a lot plus with any floor vent every day traffic knock stuff into the vents all the time anyways especially when they’re right in the middle of the walkway so this works out real good for me. They stay in place and also keeps debris from entering my air ducts I live in an RV and my air ducts are right in the walkway so this is working out amazingly well. For those of you that wanna try doing it that way it’s a good idea and it definitely works