The Supermicro FAN-0086L4 is a 40 mm counter‑rotating fan designed for the CSE‑113MTS and CSE‑113TS chassis. It features a 4‑pin connector for power and control, and offers two speed options: 12,000 RPM and 11,000 RPM. The counter‑rotating design improves airflow efficiency and balances static pressure within the system. This fan is ideal for high‑performance server environments that require reliable cooling and precise airflow management. Its compact 40 mm size allows it to fit into tight chassis configurations while delivering robust cooling performance. Manufactured by Supermicro, the fan complies with industry standards for noise and durability, making it a dependable choice for data center deployments.