MoKo 400x300mm DIY PC Case Dust Mesh Filter, [4 Pack] PVC Dustproof Magnetic Dust Filter Cover, PC Mesh Grill with Magnetic Frame Strip Computer Cooler Fan Dust Filter for Computer PC Case, Black

My system is set up with 1 140mm fan at the front as intak, 120 at the back right past my cooler and a 140 at the top above the cooler both exhausting. My PSU is also exhaust. I had three spots for 140's that were empty and the negative pressure was pulling dust in the machine and I had to clean it often.Bought these and used them to cover the 3 openings that aren't being used since the exhaust was pulling in dust. The magnets are more than strong enough and the screen will keep dust out but the mesh is not so small that it will impede air flow being sucked into the case passively.The mesh is very flexible and the 140 size I purchased worked perfectly. Now I can just take the screens off and blow them out periodically instead of bringing my computer out on to the porch to blow it out.

Nice! I got it right with the first filters I ordered on Amazon after spending 15 minutes comparing them all... The perforations are perfect for keeping out dust/debris without constricting any appreciable amount of airflow. The filter holes actually match the size of the other filter holes that came with my computer case's fan grills. I bought these larger 120mm filters to cover an inconspicuous 80mm fan on the bottom of my case, thinking it to be less restrictive than a tight fitted 80mm filter.What also makes these perfect is they're easily removable for cleaning by using a magnetic border vs screw holes. The magnets are not strong enough to potentially affect my moving spindle backup hard drive towards the bottom of my case, but strong enough to keep these MoKo filters attached to the bottom of my steel case.These really are exactly what I was hoping to find...

I have these on several PCs to keep dust and cat hair out of the works, easy to use and clean since magnetic.

First off, for how much this set costs, I have no room to be making any complaints. They work as advertised, the quality of the screen is great, they're a good product.That said... the magnets around the edge are poorly attached. Instead if being a square framed magnet, it's got separate straight line magnets attached to each individual side. Those magnets come off after a few dozen uses.But for the cost, you can easily replace them if/when they fail

Reminder: Be sure to measure anything you're about to cut-out and double-check it. Also, when cutting out the magnetic adhesive strips, be sure to account for the strip width for 2 sides (if you're cutting out a square/rectangle). I made the mistake of not doing this and had to cut off a bit each time.Originally got this to cover the vents on the side panels of my PC case (Thermaltake Core v1 for a miniITX), but I ended up upgrading my GPU to an MSI Radeon 6750 XT because of driver issues with my original GPU.If you check these parts in PCPartPicker, it will tell you these two are incompatible. (I initially did not use PCPartPicker until after I was finished with my build because I simply didn't know about it). However, I was able to install the GPU, by temporarily removing the backplate to fit it through the case. This caused a couple of problems, which prevented me from putting back the left-hand side panel and PCIe mounting bracket cover. This product helped resolve the missing side cover problem for me as well. Great!

The magnets do not stick very well, and you have to arrange them in particular ways as the polarity doesn't match consistently. They definitely weren't strong enough to stick to the metal fan screws

Build quality was awesome, better than I expected. Perfect size, plenty leftover for future projects.

I put these over some fans on my pc that I thought were getting an overabundance of dust and they work great for now.