This is a Neutrik D Series compatible mounting shell for Nexans LANmark-6 Evo Snap-in Cat.6 Ethernet Connector.
I use the Type with the part no. N420.666 but I think the other LANmark-6 are also compatible.
The part is easy to print with PETG and has a nice tight snap in.
Happy printing an I hope I see a make or comment from you if its usefull
The author hasn't provided the model origin yet.