Holder (for cable management trays etc.)

I printed 4 of these holders to attach a tray (shown in the pics) underneath my desktop. It holds my network devices (router+switch) so that they don't take any space on my desk.

The hole is for 3mm wide pipe/rail.

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/0kZ3l4CKVwt