I tried to take a picture, but didn't come out well, but yes, I'm saying the 6mm fuel tubing, I call it the hard stuff. I have it in clear and green. It really is the best stuff for our application IMO.

Tygon is great for barbed connections, where you can safety wire it. You only really need this stuff between the UAT and the pump. From the pump you can go to the 4mm hard stuff, I have a 100' roll of the 4mm.