I should note that the line I replaced was the original 42 year old line that was on the truck. I wish I paid more attention to the material, but I think it was a nylon braided rubber hose or something like that.

1962 Fleetside 4spd 235 w/O.D. posi 3:90
In the Stovebolt Gallery
1990 Subaru Legacy Wagon AWD 2.2 5sp
2013 Ram Tradesman C/V
My Webshot Photos]