Product Detail Industry leading air channeling fan Wide fan blades for reducing air resistance Standard 120mm frame for maximum compatibility with CPU coolers Integrated air channeling grille double as fan guard to reduce overall size The Fluid Dynamic Bearing (FDB) for high reliability . The "SilverStone Air Penetrator Air Channeling Case Fan 120*120*25mm/1500rpm AP121 Black" is best product for you. We recommended SilverStone Air Penetrator Air Channeling Case Fan 120*120*25mm/1500rpm AP121 Black