Almost inaudible, excellent cooling Silent Wings 4 140 mm PWM high-speed combines all the features of an almost inaudible fan with those of an extremely high-performance fan. A nearly inaudible 6-pole fan motor and anti-vibration corners combined with fan blades optimised for maximum airflow make Silent Wings 4 140 mm PWM high-speed the perfect choice for the most demanding applications in high-end systems. https://elecena.pl/product/21458065/bl097-be-quiet-silent-wings-4-140-mm-pwm-high-speed 2022-08-14 https://elecena.pl/product/21458065/bl097-be-quiet-silent-wings-4-140-mm-pwm-high-speed 2025-08-01