3/16-inch I.D. x 25 Foot PVC Fuel Line is recommended for venting and overflow lines. Constructed of plasticized PVC with a smooth hard bore to help prevent interior build up. Soft flexible tubing is safe to use with any type of gasoline or alcohol type fuel. Safely flexible down to 0 degrees Fahrenheit with a Maximum dry heat temp of 220 degrees Fahrenheit. Warning: Not for use with fuel injected engines.