Sierra Shields Series 368 Low Permeation Marine Fuel Hose 1/2"Sierra Shields Series 368 Low Permeation Marine Fuel Hose 1/2" has a plastic barrier veneer with an NBR outer layer tube to prevent permeation. The shields series is a reinforced hose that complies with EPA & CARB very low permeation requirements & is weather/UV resistant.Specifications: I.D.: 1/2" or 12.7mm; O.D.: 13/16" or 20.83mm; Wt. "C": 20; Max WP: 100; The temperature ranges from -20F to 212F; Application: Primarily used for fuel feed (gasoline up to 85% ethanol blended fuels/diesel/all bio-diesel blends); Meets USCG Type A1-15 requirements for pleasure boats; Meets SAEJ1527 Type A1-15, ISO 7840 Type A1, and NMMA/CE type accepted standards;