Top Motor Dual Bearing 40x40x20mm Fan DF124020BH Dimension: 40 (L) x 40 (W) x 20mm (H), Connector: 3pin w/RPM Bearing Style: Dual Ball Bearing, MTBF: 50,000hrs Air Flow: 10.28 CFM. Speed: 9,000 RPM. Noise Level: &lt;32 dBA.