ARCTIC Alpine 17 CO. Type: Air cooler, Fan diameter: 9.2 cm, Rotational speed (min): 250 RPM, Rotational speed (max): 2700 RPM, Noise level: 0.3 sone, Bearing type: Fluid Dynamic Bearing (FDB). Voltage: 12 V. Width: 95 mm, Depth: 95 mm, Height: 77 mm. Product colour: Black, Silver