The Helix 140mm fan has been specially optimized for liquid cooling and features excellent static pressure at low noise thanks to its 9 blade design. Fan specifications: - Dimensions: 140x25mm - Voltage: ~7 - 13.8 VDC - Current: 0.45 A - Speed: 1,500 RPM (+/- 10%) - Volume: 74.5 CFM - Static pressure: 1.58 mmH20 - Accoustic noise: < 24.9 dBa - Bearing type: Z-Axis - Connector: 3 Pin - Tach Output: Yes Model HELIX-140-BW.