The Air Series AF140 fan lets you have it all. Eleven ultra-thin, custom-molded blades push ample air volume. Rubber corners dramatically reduce vibration. The advanced hydraulic bearing system is quiet & reliable, & you can customize the look. AF model is ideal for mounting at the rear or top of your PC case as exhaust fan for your PCs motherboard & CPU, graphics accelerators, & other components that fill the case with heat. It works equally well as unrestricted intake fans for areas like side panels or bottom intakes.