Cable Duct i made for my integrated Desk PC, to hide all the cables and wiring.
Dimensions you can take from the pictures.

Updated 19/10/2016
Corrected the dimensions of the "T piece".
Added with one opening on the side and one opening on both sides, to pass the plugs.

Updated 21/10/2016
Corrected some minor errors on the new pieces

Printed upside-down with support for the side pieces.
I Printed with PLA with 0.2mm layers @ 215°C