The “19 inch rack”, you need to know about server racks. Server racks are open metal frames or enclosures that can store multiple electronic devices
NavePoint 19-inch Wide Networking Cabinet, 9U, 17 Inches Deep, White
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Rising Electronics Fixed Rack Server Shelf 1U 19'' Shelves 4 Post Rack Mount Adjustable Deep For Network (24-30 depth) - Raising Electronics
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NavePoint 19-inch Wide Networking Cabinet, 15U, 23 Inches Deep, White
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What Is A 19 Inch Rack? Why is It So Important To Consider Before Getting A Server Rack? - Raising Electronics