2-Pack Of 1U 19" Vented Server Rack Shelves; Cantilever Style Mounting - Durable 16-Gauge Spcc Cold-Rolled Steel; Total Weight Capacity Of 44Lb/20Kg - Eia/Eca-310 Compliant For Use In Standard 19-Inch Server Racks - 15.7In (40Cm) Deep; Suitable For Data/Networking/Non-Rackmount Equipment - Vented Design Enhances Airflow And Heat Dissipation - Includes Cage Nuts/Screws And Washers For Mounting - 1U Vented Server Rack Mount Tray Is Backed For Life Including Free Lifetime 24/5 Technical Assistance