Noctua NF-P12 120mm, Nine Blade with VCN, SSO Bearing Fan_ Retail. Spec. Type : Fan Fan Size : 120 x 120 x25mm Compatibility : CPU Cooler, Water-Cooling Radiator and Case Bearing Type : SSO-Bearing ( Self-stabilising oil-presure bearing ) Blade Geometry : Nine Blade Design with VCN RPM +/- 10% : 1300 RPM ( standard ), 1100 RPM ( w/ L.N.A ), 900RPM ( w/ U.L.N.A.) Air Flow : 92.3m³/h (standard), 78.5m³/h ( w/L.N.A. ), 63.4m³/h ( W/ U.L.N.A ) Acoustical Noise : 19.8 dB(A)/standard, 16.9dB(A)(w/ L.N.A ), 12.6dB(A) ( w/ U.L.N.A.) Input Power : 1.08W / 0.09A Voltage Range : 12V MTBF > 150,000 h. Dimension : 120 x 120x 25 mm. Weight : 0.9Lbs Features : Pressure-optimized Nine-Blade Design Vortex-Control Notches Smooth Commutation Drive SSO Bearing ( Self-stabilizing Oil-pressure bearing ) design. Scope of Delivery Ultra-Low-Noise-Adapter ( U.L.N.A) Low-Noise-Adapter ( L.N.A) 4 Vibration Compensators, 3 to 4 Pin Adapter and Screws Warranty : 6 Years.