This product is either discontinued or we cannot get that from suppliers.
Noctua NF-A8 5V 80mm 2200RPM Fan, Blade Geometry A-Series with Flow Acceleration Channels, Frame Technology AAO, 80x80x25 mm, Mounting hole spacing 71.5x71.5 mm, Airflow 55.5 m³/h, Noise Level 17.7 dB(A), Bearing Type SSO2, Power Connection 3-pin.
The NF-A8 5V is a dedicated 5V version of Noctua’s award-winning, premium-quality NF-A8 80mm fan. Featuring an AAO (Advanced Acoustic Optimisation) standard frame and sophisticated aerodynamic design measures such as Flow Acceleration Channels.