1U Vented Server Rack shelf is EIA-310 compliant for universal compatibility with standard 19-inch server racks - Large venting holes enhance heat dissipation and airflow - Effective mounting depth of 12.4in (31.5cm) - Made of durable 16-gauge (1.4mm) SPCC cold-rolled steel; Total weight capacity of 25lb/11.3kg - Cage nuts and screws are included - Suitable for data/networking/non-rackmount equipment - 1U vented server rack mount tray features a lifetime warranty.