Noctua PWM fans, 120 and 140 mm

1. 120mm fan Noctua nf-f12 industrial 2000 PWM ip67 Specifications: Size: 120х120х25 mm (square) Maximum speed: rpm Maximum airflow: 121.8 m³/h (71.69 CFM) Acoustic noise (max.): 29.7 dB(A) Connector: 4-pin, PWM * No mounting bolts. When buying 2 or 3 fans, PWM splitter for 3 fans = 30 GEL 2. 140mm fan Noctua nf-f14 industrial 2000 PWM ip67 Specifications: Size: 140x140x25mm (square) Maximum speed: rpm Maximum airflow: 182.58 m³/h (107.42 CFM) Acoustic noise (max.): 31.5 dB(A) Connector: 4-pin, PWM * Includes mounting bolts = 30 GEL 3. 120mm fan Noctua nf-a15 pwm Size: 140х150х25 mm (round) Maximum speed: rpm Maximum airflow: 115.5 m³/h (67.98 CFM) Acoustic noise (max.): 19.2 dB(A) Connector: 4-pin, PWM * Includes mounting bolts = 30 GEL