A2491 : 14CM TURBO FAN

140 x 140 x 25 mm TurboFan, bullet-shaped fan hub, for improved air flow..

A2492 : 12CM TURBO FAN

120 x 120 x 25 mm TurboFan, bullet-shaped fan hub, for improved air flow..

A2368 : 120mm Highest Performance DC

Cool all of the components in your computer!, High air flow, low noise..