Check the listing for details. CyberPower 4POSTRAIL 4-Post Universal Rack Mount Rail Kit, Silver. Condition: Used, Made in United States. Listed at 68.00 USD. The CyberPower 4POSTRAIL 4-Post Universal Rack Mount Rail Kit in Silver is a versatile solution for securely mounting servers, networking equipment, and other electronics in a server room or data center. Designed by CyberPower, a trusted brand in networking equipment, this kit includes four post rail components for easy installation and organization of your IT infrastructure.