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
Rack Mount Kit for Ubiquity Unifi Switch 8-150W RM-UB-T2
Server Rack, 6U Open Frame Rack, 4-Post IT Server Network Relay Rack, 19 Inch Server/
Raising Electronics Server Rack Open Frame Rack 4 Post 19 inch Adjustable Server/Audio Rack Cold Rolled Steel(15U,17 Depth) : Electronics
StarTech.com 1U 19 inch Server Rack Rails, 24-36 i
NavePoint 19-inch Wide Networking Cabinet, 9U, 17 Inches Deep, White
1u Depth-Adjustable Sliding Shelf 26 Inch Deep-42u 45u 48u Data Center Room Server Cabinet - China Rack Mount Shelf, Rack Mount Shelf 1u
I see all your sexy racks, and raise you my complete disaster : r/homelab
What is a Server Rack Cabinet?
2U Vented Rack-Mount Panel for 19 inch Equipment and Server Racks, AxcessAbles
What is a server rack and do you still need one?
Server Racks by Brand
25U 36in Knock-Down Server Rack Cabinet - Server-Racks, Server Management
VEVOR Server Rack, 12U Open Frame Rack, 4-Post IT Server Network Relay Rack, 19 Inch
Homelab rack: What to consider and what I recommend