The NA-FK1 is a second fan kit for the NH-U12S redux CPU cooler. Upgrading it to a push/pull-style dual-fan setup makes it possible to further improve cooling performance or to reduce noise levels by having two fans running at lower speeds. The kit includes a second NF-P12 redux-1700 PWM fan, anti-vibration pads, fan mounting clips, a 4-pin PWM y-cable as well as two Low-Noise Adaptors – everything you need to boost the efficiency of your NH-U12S redux!
 
| NF-P12 REDUX-1700 PWM FAN SPECIFICATIONS: |  | 
| Size | 120x120x25mm | 
| Connector | 4-pin PWM | 
| Bearing | SSO | 
| Blade geometry | Nine Blade Design with VCN | 
| Max. input power | 1.08W | 
| Voltage | 12V | 
| MTTF | > 150,000 h | 
|  |  | 
| 
| NF-P12 redux-1700 PWM |  
| Max. rotational speed (+/–10%) |  
| Max. airflow |  
| Max. acoustical noise |  
| Max. static pressure |  | 
| without adaptor | with L.N.A. |  
| 1700 RPM | 1200 RPM |  
| 120.2 m³/h | 115.5 m³/h |  
| 25.1 dB(A) | 19.2 dB(A) |  
| 2.83 mmH2 0 | 1.51 mmH2 0 |  | 
|  |  | 
| SCOPE OF DELIVERY | NF-P12 redux-1700 PWM fan | 
|  | 4x NA-AVP2 chromax.grey anti-vibration pads | 
|  | Fan mounting clips (one pair) | 
|  | NA-YC1 4-pin PWM y-cable | 
|  | 2x NA-RC14 Low-Noise Adaptors (L.N.A) |