Eddie, that looks like the A.C. Ryan Alumino filter - same thing that I'm using in my Antec900 right now and #12 in the table above. I like those a lot - they do an excellent job of keeping out pet fur and also stop a decent amount of dust. They don't create much wind noise, even when mounted directly on a 1500 rpm fan, tho they do make an annoying whistle when attached directly to the Ultra Kaze at 3000 rpm. I think that "whistle" is a result of the ripple in the mesh because the 30 x 30 mesh I tested (which looks to be the same mesh density) doesn't make that noise.