UNIVERSAL 19'' FIT: 1U vented server rack mount shelf is designed to fit any EIA-310-compliant 19-inch server rack or cabinet; Mounting depth of 15.7in (40cm) for data, IT, networking, or other non-rackmount equipment MAXIMIZE VENTILATION: The vented shelf plate of the cantilever rack shelf ensures consistent airflow to dissipate heat and promote airflow to equipment HEAVY-DUTY & DURABLE DESIGN: Made of 14-gauge (2mm) SPCC cold-rolled steel, the sturdy cabinet shelf ensures long-term durability and supports a total weight of 44lb (20kg) VERSATILE FUNCTIONALITY: Designed to fit in 2- and 4-post racks and features a 15.7 inches (40cm) depth; Create storage for tools, accessories, or non-rackmount equipment for efficient organization and convenient access THE IT PRO'S CHOICE: Designed and built for IT Professionals, this dual-pack of ventilated rack shelves is backed for life, including free lifetime 24/5 multi-lingual technical assistance