After searching for 1/4" reservoir to master cylinder tubing not effected by brake fluid, and deciding on Tygon 2375, I discovered several sources ranging from $5 to $18 per foot but only in 1 foot lengths. Since my '72 needed 2 21" tubes, I kept searching and found US Plastics who offered it for $1.77 per ft. in 10' rolls. with shipping it came to $2.92 per ft. I was able to cut the lengths I need with plenty left over for my next project. FYI