Remove the guess work out of hose compatibility issues! PTFE lined hose is inert so it will perform with any type of liquid, air or gas in a car or boat - including harsh pump fuel additives and Ethanol blends. Add these new Speed Seal hose ends to your Speed Flex hose and the entire assembly is protected. Anodized Speed Seal hose ends and Earl's Speed Flex hose are the perfect combination for any race, street or marine environment.