Ordinary fuel line hoses are designed to handle fuel on the inside only, but ACDelco Professional, premium aftermarket Submersible Fuel Line Hoses exceed the SAE 30R10 rating and are capable of handling gasoline, alcohol-extended gasoline, or diesel fuel in fully immersed, mobile, stationary, and Marine applications. They are temperature rated from +302 degrees Fahrenheit (+150 degrees Celsius) and have a Fluoroelastomer (FKM) tubed cover that resists gas permeation and slows down aging. These premium aftermarket replacement submersible fuel line hoses are manufactured to meet your expectations for fit, form, and function.