80mm 12V Brushless DC Cooling Fan Dynatron 80x80x25.4mm Medium Speed Single Ball Bearing Top Motor DF128025PM (or DF128025BM, DF1208BM in Green Label) Top Motor (TopMotor) 80-mm ( 8-cm, 8cm ) System Fan FN-8025-3P2-B1M-DY Size: 80x80x25.4mm Bearing System: Single Ball Bearing Rated Voltage: 12V Speed: 2600 +/- 10% RPM Air Flow: 27.94 CFM Static Pressure: 2.47 mm-H2O Noise Level: 30.10 dBA click here for Dynatron / Top-Motor Item Numbers Comparison Chart