G1700 Polyurethane tubing is formulated for good resistance to gasoline and solvents.
It is extremely resilient and kink-resistant and stays flexible at very low temperatures.
Because of these useful characteristics, G1700 is used as a fuel line on small gas engines, especially where it is helpful to see the fuel in the line.
Polyurethane tubing is often also used as a sleeve over wire cable to prevent the wire from chafing.