75mm x 75mm x 30mm 12V 2-Pin hydraulic bearing blower cooling fan for computer case. This 12V blower, has a quiet sleeve bearing and a 2-pin (2 wire) PCB motherboard connector. 28dBA (at rated voltage and zero pressure, measured at 1 meter to side) is an low hum in a normal office. Sleeve bearing fans are limited to shaft horizontal orientation to prevent oil leakage. 2 Pins power connector cooling fan for desktop computer case. It runs quite fast and has large airflow to enhance cooling performance. Keeps computer working well.