The Scanstrut Deck Transit is designed in such a way that a cable that is already plugged in can still be routed through the transit. The various rubber inserts, each with its own hole diameter, allow the transit to be sealed watertight. If the correct size is not supplied, it is possible to drill an insert to the correct size. Tip: first place the insert in the freezer for a few hours and use 1-2 mm larger diameter than the cable thickness. When the insert thaws, it will still be tight around the cable.