Rack mount hubs fit in a standard 19-inch rack. Providing a Clean and Secure install into your Network or Server Rack. Similar to DIN-Rail mounts, these hubs allow the installation of a multiport usb hub with ease and without all the clutter. This method is perfect for Charging / AV Carts with a standard 19″ rack, server rack cabinets, and network cabinets. Coolgear’s rack mounting hubs measure out to 1U (or 1 Rack Unit) with a height of 13/4 inches (or 44.45 mm).