Helix Racing Products 3/8" Fuel Line, 3 ft. Helix Racing Products 3/8 x 1/2 Transparent Polyurethane Fuel Line, sold in 3 ft. roll. Helix Fuel Line is a premium polyurethane , 85 durometer, which provides for superior abrasion, kink, tear, oxidation and chemical resistance. Please select color from the drop down menu. Sold in 3 Ft. Roll Please Select Color From Drop Down Menu Inner Diameter: 3/8" Outer Diameter: 1/2" Melting Temperature: 370 F Operating Temperature: 75-155 F 85 Durometer Do Not Use with Fuel Containing More Than 10% Alcohol Made in U.S.A.