CNAweb 1U 19-Inch Vented Rackmount Equipment Shelf for Cabinet Server Rack 11" Deep Easily add a sturdy and convenient shelf to any server rack or cabinet Standard 1U height and 19" width universally fits all 19" width rack rails Vented design promotes air circulation and helps keep devices running cooler Solid steel construction Dimensions (in.): 19" (W) x 11" (D) x 2 1/4" (H)