Shields Hose - Sierra Supply Hose - Fuel Feed A1-15LP - 1/2" x 50' - 3680126. Low Permeation Marine Fuel Hose has a plastic barrier veneer with an NBR outer layer tube to prevent permeation. This polyester reinforced hose complies with EPA and CARB very low permeation requirements and is weather/ UV resistant. This hose is primarily used for fuel feed (gasoline up to 85% ethanol blended fuels, diesel, all bio-diesel blends). It meets USCG Type A1 - 15 requirements for pleasure boats. Temperature ranges from -20F to 212F. 2 year emission performance warranty.. Features:. Inside Diameter - 1/2". Outside Diameter - 13/16". Length - 50'. Working Pressure - 100#