NZXT HF-28140-B1. Type: Fan, Fan diameter: 14 cm, Rotational speed (min): 500 RPM, Rotational speed (max): 1500 RPM, Noise level (low speed): 22 dB, Noise level (high speed): 33 dB, Maximum airflow: 91.19 cfm, Minimum air pressure: 0.17 mmH2O, Maximum air pressure: 1.52 mmH2O, Bearing type: Fluid Dynamic Bearing (FDB). Width: 140 mm, Depth: 140 mm, Height: 26 mm. Product colour: Black