The PBPA19003BK is an aluminum rack panel used to fill 2U of unused space in an equipment rack. It is constructed from 8-gauge (0.125-inch) 5052-H32 aluminum and features a durable matte black powder paint finish. With a height of 3.50 inches and four mounting slots, it fits standard EIA-310-D compliant rails. Installing this RoHS-compliant panel improves cooling efficiency and prevents air re-circulation, making it ideal for managing airflow in data centers and server rooms.