Used in my electronics lab for bench test leads (wires).
Rack is 15in wide, 3.5in slot length, .3in slot width, 21 slots
Fusion 360 file is here
https://a360.co/3j1WoMK
License
Creative Commons - Attribution
You may distribute, remix, tweak, and build upon this work, even commercially,
as long as you credit Craig Hollabaugh for the original creation.