man i sure do not know the material name. you can call your local hardware store though they will know exactly what you are talking about. they sell this stuff in a clear hose and a clear braided line, but I was told to get the clear braided. I have the stuff running from both of my tanks and then all throughout my entire engine. its great cause I can take a peak anytime and see if I have air in my lines (i have had problems with this in the past) so it makes it real convenient. i have been running bio now for like 8 months and the lines are still crystal clear they havent even clouded up or anything.