360mm 120mm x 2 PC Fan Dust Mesh Filter 4.72inch PVC Computer PC Case Dust Proof Filter Cover Magnetic Black 2-Pack

As someone who has had to go to great lengths to keep dusk out of their tower computers a simple and easy solution is always preferred and Having to install custom-fitted mesh screens that can be hard to clean after being installed. These magnetic covers can sit on the inside or outside of the case over the intake fans, they do not restrict the airflow very much and the magnets are strong enough for a good seal. I also cut and adjusted the magnet locations to get more surface area. These covers are large enough to cover most vents but I recommend you measure your vent locations before making the purcase.

I work in a very dusty warehouse. Our old stereo died from what I'm guessing was a decade of dust and neglect. I bought a new component receiver and it had all these giant hole vents on top, so I bought this to cover the openings and so far it has worked like a charm! I even bought a few more to cover the side venting too.

Magnet strip came off of one of them but definitely catch alot of dust from my house

I was looking for a way to prevent cat hair from entering the inside of the case, and the holes on this filter are tiny enough to do that. Please note that this will obstruct airflow somewhat and give you slightly higher thermals. Most excess airflow will follow the path of least resistance, that is, toward the back of the case. For me, it's a small price to pay to keep the inside of your case clean.

Perfect for a PC in a dusty environment.