19 inches is the standard width of a mountable server rack. In this guide, we’ll cover everything you need to know about sizing rack servers.
Server Rack Sizes: Understanding the Differences - RackSolutions
How to Mount a Network Switch to a Rack?, by Kelly Zeng
What is a 19 inch rack? - RackSolutions
19-inch rack - Wikipedia
NavePoint 9U Server Cabinet Wall Mount Rack Enclosure Includes 2 Fans, Locking Glass Door, Removable Side Panels – 9U Network Cabinet 17.7” Deep, 19 Inch Server Rack for IT and A/V
The 2U 14in deep wall mounting bracket for patch panels delivers a sturdy and dependable equipment storage option, allowing you to wall mount data/IT
2U Wall Mount Network Rack - 14In. Deep (Low Profile) - 19 Patch Panel Bracket for Shallow Server, IT Equipment, Network Switches - 77lbs/35kg Weight
ADJUSTABLE DEPTH: 4-Post 18U open frame server rack with 4 vertical rails and adjustable mounting depth 22 to 40 (56cm to 101cm); Compatible with
StarTech.com 4-Post 18U Mobile Open Frame Server Rack, 19in Network Rack with Wheels, Rolling Rack for Computer/AV/Data/IT Equipment - Casters
Aeons 9U Professional Wall Mount Network Server Cabinet Enclosure 19-inch Server Network Rack Low-Profile Black
19-inch rack - Wikipedia
The different dimensions of a 19 inch rack
19-inch rack - Wikipedia