Next, two bags of PTFE tube. The 3mm ID one I get - that's a reverse Bowden. What the 2mm ID one is for, I have no idea.
Checking the Trident BOM, it does seem there's _two_ bits of tubing required. One is indeed 3mm ID, the other is just labelled 'Bowden Tube (m)', whatever the heck _that_ means.
Voron, sort out your damn docs.