magnaroute Fan Kit compatible with Cisco 2821, 2851 Wires are properly trimmed and crimped - ready to install. We use only brand new top tier fans (unless noted in the product description) from Delta, Sunon, NMB, and PSC. Guaranteed to meet or exceed original manufacturer airflow and pressure requirements. Similar to Cisco part ACS-2821-51-FANS however does not include the metal bracket. 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.