Noctua NF-F12 iPPC 2000 IP67 24V, 4-Pin, Heavy Duty Cooling Fan with 2000RPM, IP67, 24V (120mm, Black) Award-winning 120x25mm fan with FocusedFlow frame for high static pressure and superior cooling efficiency 24V, 2000rpm industrialPPC (Protected Performance Cooling) version with 4-pin connector and PWM speed control (1050rpm max. in 12V PC environments) High-speed industrialPPC version for industrial heavy-duty applications that require extreme cooling performance and advanced ingress protection Ruggedised fibre-glass reinforced polyamide construction and IP67 certified water and dust protection Trusted Noctua quality backed up with 6-year manufacturers warranty