Review on HFEIX Filter Computer Magnetic Length by Ron Coleman

Looks good but beware - unlike the competition it's not reversible - the back isn't visible in the photos and that's it because the mesh completely covers the rim (others have two layers capturing the mesh, this one only has a single layer frame. This only shows its magnetic ability on the side of the rim. The mesh side is non-magnetic. So when you put it on the Place the outside of the case or a fan, you'll see the mesh side - without the border - it looks like a frameless mesh.