Vertiv SET DECORATIVE EXTRUSION 46U VERTICAL is a finishing accessory for 46U server racks. It adds a decorative element to a network or server enclosure while leaving mounted equipment accessible. The exact Vertiv part number is 011308731.
Use this extrusion when you want a more finished appearance for a rack enclosure. Its stated purpose is decorative, so the description focuses on presentation and access to equipment rather than unconfirmed structural or airflow benefits.