The ARCTIC S12038-4K 120mm 4K RPM Server Fan (3 Pack) is a high-performance PWM cooling fan kit engineered for enterprise servers, industrial systems, radiators, and workstation environments. Featuring a powerful 600–4000 RPM speed range, dual Japanese ball bearings, 106 CFM airflow, and 11.45 mmH₂O static pressure, this 120x120x38mm server fan bundle delivers reliable 24/7 cooling performance, exceptional airflow efficiency, and long-lasting durability for demanding server and industrial applications.