The AC Infinity rack shelf is designed for supporting non-rack mountable equipment such as routers, models, keyboards, and monitors. Fits into all standard 19" racks and cabinets, and takes 1U or 1RU of space. Vent design maximizes airflow and prevents hot spots, while maintaining structural integrity. Constructed of heavy-duty 2.4mm thick cold rolled steel with a black powder coated finish. With a dual flange design, the shelf has a weight capacity of 40 lbs. Internal usable width is 43.7 cm, usable depth is 14.9 cm, usable height is 3.8 cm, with a 7mm upward lip. Includes four pieces of 10-32 screws, four plastic washers, and four cage nuts.