Includes one StarTech 2U 16" universal vented rack mount cantilever shelf Designed to be compatible with standard 19” server racks with front mounting options Vented design allows maximum airflow, so your rack or cabinet won’t get too hot Highly durable, so it can easily support your server without taking damage Commercial-grade cold-rolled steel is ideal for industrial or commercial use Maximum weight capacity: 22.6kg (50lbs.)