"SpecificationsMfr Part Number: TY-147Features:PWM fan; provides simple and easy adjustment of fan speed with the latest ETC ICSeven Silent Torpedo Blades - "submerges"; gives most quiet and efficient airflowEnhanced Hyper-Flow Bearing (EHFB) - to ensure consistent and stable rpm; prolonged lifetime of usageAerodynamic body - Less friction around the edges and give more centered and concentrated airflowFan Speed: 900 ~ 1300 RPM (PWM)Fan Noise: 17 ~ 21 dBAAirflow: 28.3 ~ 73.6 CFMDimensions (WxLxH): 26.5 x 152.0 x 140.0 mmWeight: 160.0 g"