Evercool EC5010M12CA 50mm x 50mm x 10mm 3 Pin Tachometer Ball Bearing CPU fan Dimensions: 50mm x 50mm x 10mm Voltage: 12v 0.09A Noise: &lt;23dBA Speed: 4500 rpm Airflow: 9.59 CFM Bearing: Ball Connector: 3 Pin Tachometer (RPM Monitoring)