80mm 12V Brushless DC Cooling Fan Dynatron 80x80x25.4mm Medium Low Double Ball Bearing Top Motor DF128025BL (or DF128025BC, DF1208BC in Blue Label) Top Motor (TopMotor) 80-mm ( 8-cm, 8cm ) System Fan FN-8025-2C-B2L-DY Size: 80x80x25.4mm Bearing System: Double Ball Bearing Rated Voltage: 12V Speed: 2200 +/- 10% RPM Air Flow: 23.12 CFM Static Pressure: 1.82 mm-H2O Noise Level: 27.07 dBA click here for Dynatron / Top-Motor Item Numbers Comparison Chart