80mm 12V Brushless DC Cooling Fan 80x80x20mm High Speed Sleeve Bearing Dynatron (Top Motor) DF128020SH or DF1208SH 80x80x20 mm 80-mm ( 8-cm ) System Fan FN-8020-2C-SH-DY Size: 80x80x20mm Bearing System: Sleeve Bearing Rated Voltage: 12V Speed: 3000 +/- 10% RPM Air Flow: 33.00 CFM Noise Level: 30.00 dBA click here for Dynatron / Top-Motor Item Numbers Comparison Chart