Noctua Industrial NF-F12 120mm x 25mm Fan - 2000RPM (NF-F12 iPPC-2000 IP52) Award-winning NF-F12 design, 2000rpm industrialPPC version Varying Angular Distance and Vortex Control Notches Three-phase motor design, Class-leading energy efficiency, Fibre-glass reinforced polyamide construction 6 years manufacturers warranty Certified IP52 water- and dust protection, Flow Acceleration Channels, Inner Surface Microstructures