Semi-rigid tubing has a thin Nylon outer layer, Polyurethane middle layer, and a thin Nylon inner layer Very high chemical resistance to withstand almost any chemical exposure, especially fuels and oils Can be used for other fuel line applications including fuel injection and with fuel containing alcohol Allows for maximum space efficiency compared to other submersible tubing Made in the U.S.A.. FUEL LN 5/16X25FT SUBMER