BGEARS 80mm Fan Filter With Washable Filter - 80 x 80 x 10mm  FAN FILTER 80MM

Not perfect, but it does help keep the dust out. I still have to clean out the computer every so often. Filters require more maintenance then advertised. I had to file down the flanges on the plastic cover to make them detach easier.

works fine, pretty light filter material, requires more maintenance than some to keep clean.

It is not the best filter out there, but it does its job great. The filter material is not that thick, so you must clean it on a monthly basis or else the dust will get inside. But in the other hand, it doesn't obstruct airflow.Cleaning is a snap, just...

The good news is that it does'nt restrict the air flow much. The bad news is that the filter material is so thin that it barely filters. Cleaning the filter is also problematic since you need use 4-crowbars simultaniously to unsnap its plastic cover.