If anyone ever needs to replace their tubing, you can order the exact 3/4" OD (outside diameter) 5/8" ID (inside diameter) tubing that you need to fit your caps. The caps are wonderful but nhaler can't seem to get things in order.
If you need a direct link of where to order the tubing, which you can cut yourself using a pipe cutter or a lightsaber, you'll be able to make your tank any size you want to fit nearly any cart or atty.
Just to make sure the guys at nhaler know, I plan on ordering caps galore from these guys to make my own tanks with, but as of now, the tube that came with mine wasn't properly shaped so it leaks. So, without being able to order another tank, or replacement tubing, this is the last resort.
Satin SS caps are so so sexy though.
Holla