Thanks to its 5/8 inch internal diameter, PPEs big 5/8 inch 30R10 Fuel Hose ensures that your engine will get all the power providing fuel that it needs. Due to the two layer construction, this "Immersion Rated" fuel hose does NOT have the same problem that most hoses have which is where the exterior of the fuel line disintegrates from constant exposure to corrosive fuel. This fuel hose features 30R10 rated material throughout its construction, not just the inside. That is why PPE uses the 30R10 fuel hose in its in-tank fuel pump assembly. It is reinforced with synthetic braiding for added durability. PPEs 30R10 Fuel Hose is the perfect choice for automotive, agricultural, industrial, and marine applications where durability and performance are a necessity.