Review on HFEIX Filter Computer Magnetic Length by Fisseha Rodgers

I may have technical problems or I bought the wrong product for my computer, but according to the website my computer was fine. I opened the package and found four (I think) very nice large squares of fine mesh encased in black rubber. I looked at the fan on the back of my computer and immediately gave up. I didn't return them, maybe I just didn't understand the installation. I'll keep researching, but they're not for the uninitiated.