USCG Type A1 Blue Cover Fuel Hose, SAE J1527, 0.25 Inch ID, Up To 1500.00 PSI

Actually, this hose can handle both diesel and gasoline, along with hot lube oil and water. It's even rated for marine fuel systems, meeting SAE J1527 Type A1 standards.

Rated for both gasoline and diesel fuel, along with hot lube oil and water. It uses an AQP elastomer tube with brass plated steel wire reinforcement and a braided refractory insulation layer, so it's built to handle the fuel types you'd run into in a marine setup without breaking down from exposure.

For sizing, the inside diameter is 0.25 inch and the outside diameter is 0.58 inch, so it matches a quarter inch ID hose but has a thicker overall build.

Both. The FC234 handles gasoline, diesel fuel, hot lube oil, and water service. The AQP elastomer tube and brass plated steel wire reinforcement give it the chemical resistance to run either fuel type without issue, so you don't need separate hoses for mixed-fuel applications on the same vessel.