AC Infinity Vented Cantilever 1U Universal Rack Shelf, for 19&rdquo; equipment racks. Heavy-Duty 2.4mm Cold Rolled Steel, 60lbs Capacity Fits all 19 racks and cabinets to hold various IT, network, and AV equipment. Vent design maximizes airflow while maintaining structural integrity. 60 pound weight capacity, up to 70% more than other cantilever rack shelves. Heavy-duty 2.4mm thick SPCC cold rolled steel construction. 1U height, 10.5 deep, includes 10-32 screw, washer, and cage nut set.