Fits all 19 racks and cabinets to hold various IT, network, and AV equipment. ^^ Vent design maximizes airflow while maintaining structural integrity. ^^ 100 pound weight capacity, up to 80% more than other cantilever rack shelves. ^^ Heavy-duty 2.4 mm thick SPCC cold rolled steel construction. ^^ 2U height, 16 deep, includes 10-32 screw, washer, and cage nut set.