NZXT HF-28140-B1 Aer RGB 2 140mm PWM, Fan Size 140 x 140 x 26mm, 222G, Plastic, Rubber, PCB Material, 30.39 – 91.19 CFM Air Flow, 0.17 – 1.52mm-H2O Fan Air Pressure, 500-1,500 RPM, 22~33 dBA noise Level, Fluid Dynamic Bearing (FDB), 4-Pin PWM. Integrating seamlessly into the hue 2 ecosystem, aer rgb 2 fans deliver optimal airflow and advanced lighting customizations. Connect up to five fans per channel or mix-and-match with any hue 2 accessory.