Delta FFB0412SHN 40mm x 28mm Extreme Speed Ball Bearing Fan FFB0412SHN-FOO Size: 40mm x 40mm x 28mm Bearing System: Ball Bearing Noise: 54.5 dba Tachometer (RPM Sensor): Yes Max Speed: 13,000 RPM! Air Flow: 24 CFM Rated Voltage: 12V ( 4.5 ~ 13.80 ) Input Current: 0.60A Wire Length: 12" inch wires (black, red, blue)