Aerocool Dark Force 9cm, Fan, 9 cm, 1800 RPM, Black Aerocool Dark Force 9cm. Type: Fan, Fan diameter: 9 cm, Rotational speed (max): 1800 RPM, Maximum air pressure: 1,32 mmH2O. Voltage: 12 V. Width: 90 mm, Depth: 25 mm, Height: 90 mm. Product colour: Black