The original cable guides of my equip cable mangement panel were just a bit too long to fit my rack with the door closed.
The new ones are 2cm shorter, so the door can close comfortably.
Original Panel:
https://www.eetgroup.com/de-at/327311-equip-19-equip-cablemanagementpanel-wid-w124887323
The author hasn't provided the model origin yet.