This product is either discontinued or we cannot get that from suppliers.
Noctua 92mm B9-REDUX-1600-PWM, Connector 4-pin PWM, Bearing SSO, Rotational Speed (±10%) 1600 RPM, Airflow 37.8 CFM, Acoustical Noise 17.6 dB(A), Static Pressure 1.61 mm H2O, Voltage 12 V, MTBF > 150.000 h.
The classic NF-B9 is a long-standing favourite among enthusiast users around the world and has helped to found Noctua’s reputation as a top-tier manufacturer of premium quality quiet cooling components.