UNIVERSAL 19'' FIT: This 1U vented server rack mount shelf is designed to fit EIA-310 compliant 19in server racks and can accommodate an internal depth of 20in (50.8cm) for your data, IT, networking, or equipment from brands like APC, Dell, Lenovo and HPE DURABLE DESIGN: Constructed with 2.0 mm thick SPCC commercial cold-rolled steel, the sturdy front mounted cabinet shelf ensures durability and supports a total weight of 55 lbs (25 kg) making it the perfect rack shelf for any environment MAXIMIZE VENTILATION: The vented shelf plate on the cantilever rack shelf helps to improve airflow to effectively dissipate heat away from your equipment EASY ACCESS: The shelf can be used for modems, routers, Wi-Fi access points, and other IT/network/telco equipment that can't be mounted on a rack or to store and access frequently used tools and supplies STARTECH.COM ADVANTAGE: IT professionals’ choice for over 30 years, this 1U vented server rack shelf is backed for life by StarTech.com, including free lifetime 24/5 multi-lingual technical assistance