Fuel line inside diameter: 3/16 inch (4.5mm); outer diameter: 1/3 inch (8.5mm). Fuel line Wall thickness is 4mm, oil resistant, cold-resistant and ethanol tolerance, no worries about leakage.c 3/16 inch fuel line is made of rubber, long service life, flexible and easy to install. For conveying gasoline, diesel, and bio-diesel. 3/16″ Fuel Line fit for tractors, blower, lawn mower, motorcycle, bicycle, snowmobiles, garden tillers, go karts, scooter, ATV, UTV, generators and so on. Customer service: If there are any quality problem, we will provide unconditional refund service within 30 days after receiving the goods. 10 feet (3m) 3/16 fuel line with 20 pcs clamp