Universal Marine Fuel Line Outboard Primer Bulb for Boats. Designed with high-quality rubber materials, it can adapt to various temperatures and enhance durability. Compatible with ethanol blended fuels, engineered low permeation material prevents fuel evaporation, suitable for Boats, RVs, Tractors, and Caravans. Premium quality rubber line hose with rubber bulb and stainless steel clamps. Fuel Line dimention: 3/8 (10mm). Outer diameter: 5/8 (16mm). Length: 9.8 ft Disclaimer: Product does not come with engine or tank fittings, as it is just a universal fuel line. Rubber products, please do not expose to the sun or other rough environment for long time.