PGXL Rack Mount Shelf
https://4o3a.com/genius-accessories/pgxl-rack-mount-shelfHeight: 4U, Width: 19
What are the Height, Width, Depth dimensions of the PGXL rack mounting tray?
Does this help you?
Also, on Wikipedia, look up “RACK UNIT”. It gives loads of information, including standard heights as 44.45mm, so “4U” would be 4 times 44.45. (177.8mm)
73 de Mike G4GWH
4U
73
Thanks for confirming 4U high.