Inner tube material provides extraordinary resistance to gasoline, diesel and alcohol-enhanced fuels. 3/8" ID Type A1 Marine Fuel Line Hose MPI Premium 350 ISO 7840-A1 SAE J1527 This hose has a 3/16 wall.
Meets standard for 'under floor' line. Flexible enough to fish through tight areas and heavy enough to resist crushing. Accepts appropriately sized fittings and seals tight. True performance of this fuel line relative to the adverse effects of ethanol cannot be made at time of purchase.
Excellent quality, about twice as thick as regular fuel line. Time will tell ,but I think it will hold up a very long time. I used it to move my fuel tank from back of jon boat to front.