Delta Electronics PFC1212DE 120x120x38mm Cooling Fan, 252.85 CFM, 5500 RPM, 66.5 dBA, 4.8 Amp Fan size: 120 x 120 x 38mm Air Flow: 252.85 CFM Noise Level: 66.5 dB-A Speed: 5500 RPM 4-pin PWM connector with extension cable