[Size]: 1U Height, 19" (482.6mm) Width, 12" (300mm) Depth. [Application]: Fit with all 19 racks and cabinets to hold IT, network and other equipment. [Ventilation]: Vented design to provide the airflow necessary to keep equipment running cool. [Heavy Duty]: Made of SPCC cold rolled steel with powder coated finish. Supports a total weight load of 50 pounds (22 kilogram) [Included Accessories]: Including 4 x M6 screws & cage nuts, 4 x M5 screws & nuts.