2U Vented Shelf 20In - 19" Compliant 2U 20" Deep Server Rack Cabinet Shelf For A Universal Fit In Any Eia/Eca-310 Server/Av Rack And Includes Mounting Hardware - Vented Rackmount Cantilever Tray Improves Airflow Around Devices On The Shelf And Within The Rack - The Durable Shelf Is Easy To Install, And It'S Constructed Of Durable 16 Awg Spcc Commercial Cold-Rolled Steel For Up To 200Lbs - The Center-Mount Design Allows Easy Access To The Front And Back Of The Equipment For Installation/Maintenance/Cable Routing.