Review on 140Mm Anti-Vibration Gaskets (2 Pack) By Coolerguys by Richard Sallah

While these do go in they don't fit perfectly like many of the reviews here state. Some of my 120mm fans have extra rubber that sticks up which will likely change as they break in over time. The good news is that by buying and installing 5 of these (4 for fans, 1 for a radiator) it fixed my case vibration so they do what they are advertised to do. I would probably buy again if I had to build another pc.