This is a genuine Supermicro Mylar air shroud designed for their SC512F+X13SCH-SYS chassis. It is a crucial component for maintaining optimal airflow and cooling within the system. The 'BrownBox' designation indicates it comes in simple, protective packaging.
MCP-310-51207-0B - Supermicro AC MCP-310-51207-0B Mylar air shroud for SC512F+X13SCH-SYS BrownBox