Helix High Pressure Fuel Line High pressure bulk fuel line available in a wide variety of colors. Highly transparent for great visibility of fuel level and flow. Features: Inner diameter: 5/16 (7.9mm) Outer diameter: 0.47 (12.01mm) Premium transparent polyurethane tubing 85 durometer line provides superior abrasion, kink, tear, oxidation and chemical resistance Includes a very strong nylon inner band, yet remains flexible Operating temperature -40 F to 155 F Melting temperature 370 F Withstands up to 200 psi Made in the U.s.a. Note : Do not use with fuel containing more than 10 alcohol.