The 1U vented server rack mount shelf is 10-Inch, 1U shelf for almost any standard 19in server rack or cabinet with front mount options. Its versatile design ensures it works great for all your computer, AV, network and data equipment needs. Added Ventilation this vented cantilever shelf helps to improve air flow and lower temperatures in the rack, ultimately helping to extend the life of your equipment and keep it safe. Heavy-duty Construction Constructed using grade cold-rolled steel, this durable fixed rack shelf can hold up to 55 lbs of equipment, The rugged steel construction holds up to even the harshest industrial environments, helping to keep your equipment safe.