Spectra Premium Spectra Fuel Tank F42E Unit is designed to Original Equipment (OE) fit, form and function requirements Lock ring included to reduce installation time and to ensure a complete repair Made with corrosion resistant, OE approved, Ni-Terne steel for durability Unit is leak tested after production to ensure product in free from fuel and/or evaporative leaks Road tested to ensure real world performance and to verify that each design meets Spectra Premium's high standards for quality.Designed for use with gasoline containing up to 20% ethanol (E20) and diesel containing up to 5% bio diesel (B5)