Aerocool DS, Fan, 5.51" (14 cm), 700 RPM, 1000 RPM, Black, Blue Aerocool DS. Type: Fan, Fan diameter: 5.51" (14 cm), Rotational speed (min): 700 RPM, Rotational speed (max): 1000 RPM, Minimum air pressure: 0.74 mmH2O, Maximum air pressure: 1.21 mmH2O. Voltage: 12 V. Width: 5.51" (140 mm), Depth: 0.984" (25 mm), Height: 5.51" (140 mm). Product color: Black, Blue