Noctua NF-R8 Raised-Blade design and SSO Bearing Fan_ Retail * Spec. Fan Size : 80 x 80 x25mm Compatibility : CPU Cooler, Water-Cooling Radiator and Case Bearing Type : SSO-Bearing ( Self-stabilising oil-presure bearing ) Blade Geometry * Features : Raised Blade Design 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.