80mm 12V Brushless DC Cooling Fan Dynatron 80x80x25.4mm High Speed Double Ball Bearing Top Motor DF128025BH (or DF128025BA, DF1208BA in Blue Label) Top Motor (TopMotor) 80-mm ( 8-cm, 8cm ) System Fan FN-8025-34P-B2H-DY Size: 80x80x25.4mm Bearing System: Double Ball Bearing Rated Voltage: 12V Speed: 2900 +/- 10% RPM Air Flow: 31.96 CFM Static Pressure: 3.16 mm-H2O Noise Level: 34.14 dBA click here for Dynatron / Top-Motor Item Numbers Comparison Chart