5/16-inch I.D. x 3 Foot Black Tygon Premium Fuel Line. Stronger and more durable than vinyl fuel line. Fuel line stretches easily over fittings or petcocks and is safe for use with any type of gasoline. Resistant to direct sunlight, swelling, hardening and/or cracking and remains flexible in temperatures from: 35 F to 165 F. Warning: Not for use with fuel injected engines.