Aerocool VERKHO4, Cooler, 12 cm, 800 RPM, 2000 RPM Aerocool VERKHO4. Type: Cooler, Fan diameter: 12 cm, Rotational speed (min): 800 RPM, Rotational speed (max): 2000 RPM, Minimum air pressure: 0.78 mmH2O, Maximum air pressure: 1.24 mmH2O. Width: 123 mm, Depth: 73 mm, Height: 156.5 mm