Confirmed with detailed specs. Here's the accurate version:

The Supermicro FAN-0156L4 is a Delta counter-rotating cooling fan designed for Supermicro's CSE-113TS, CSE-514, and CSE-815TS series chassis, providing high-speed, high-density cooling for 1U server platforms. Built with a Delta GFB0412SHS-CA03 mechanism, this compact 40mm fan delivers dual counter-rotating impeller technology, maximizing airflow within the space-constrained thermal envelope typical of 1U rack servers.

Key Features & Benefits

• CSE-113TS/CSE-514/CSE-815TS Compatibility: Specifically engineered and Supermicro-certified for CSE-113TS, CSE-514, and CSE-815TS series chassis (including CSE-514-441), ensuring proper fit and validated cooling performance.
• Counter-Rotating Fan Design: Utilizes dual counter-rotating impellers, boosting static pressure and airflow efficiency compared to standard single-direction fan designs — ideal for dense 1U chassis airflow paths.
• High-Speed Delta Motor: Built with a Delta GFB0412SHS-CA03 motor, delivering variable speed operation between 11,000-13,000 RPM depending on thermal demand.
• Solid Airflow Output: Delivers 25.2 CFM of airflow, providing effective cooling within the compact 40mm form factor.
• 4-Pin Connector: Standard 4-pin connector design, ensuring straightforward compatibility with supported Supermicro chassis fan headers.
• RoHS/REACH Compliant: Meets RoHS and REACH environmental compliance standards, supporting responsible sourcing and deployment requirements.

Technical Specifications