magnaroute Power Supply Fan compatible with Cisco 2811 (ACS-2811-FAN-3) Guaranteed to meet or exceed original manufacturer airflow and pressure requirements. We use only brand new top tier fans (unless noted in the product description) from Delta, Sunon, NMB, and PSC. Fan wires are properly trimmed and crimped - ready to install. Similar to Cisco Part ACS-2811-FAN-3. Replaces OEM Fans: Sunon PMD1204PQB1-A(2).F, NMB 1611KL-04W-B59, and others. Product description is made by the manufacturer and quality of materials can only be guaranteed when purchasing from the manufacturer's (magnaroute LLC) offer on Amazon.