You be able to load various conduit fittings and cabletray fittings....
...and create various family conduit types and cabletray types.
It comes out of the box with various sizes that include inside and outside diameters. You also have control of customizing various cable tray and conduit sizes as well.
You can control the Detail Level and control the Visibility and Graphics of conduit and cable tray to control the display those objects just as you can currently control the display of piping and duct.