5/16" x 50' Boxed Barrier Lined B1-15 EPA Compliant Outboard Fuel Line Hose - GrayThis hose is built with the best fuel and age-resistant formulations and a unique "Barrier Liner" on the inside surface of the tube, so fuel is not in direct contact with rubber. This greatly reduces fuel permeation and prevents ethanol degradation of the rubber tube, which can cause small pieces of rubber to reach and damage the engine. That is particularly important considering the prospect of higher ethanol blends (E-15) available at gas stations next year. Features: Provides extraordinary resistance to fuel permeation, aging, heat, cold, and ozone  Also, provides excellent rope-like bend-ability and fitting retentionFor both gasoline (including ethanol blends up to E85) and diesel (including bio diesel blends up to 100%)EPA Certified and CARB Executive Order for low permeation Type B1-15NMMA Type Accepted & CE certifiedApplication:Marine Fuel Hose for distribution, return, vent and transferFor all marine fuels including gasoline, alcohol blends (CE-10), diesel and bio-dieselConstruction:Tube: Fluoroplastic Internal BarrierCover: Gray CPE RubberReinforcement: 2-Spiral Polyester Plies Temperature Range: -20°F to 212°F (-28ºC to 100ºC)Length: 50’ (15m) BoxedSpecifications:Inner Diameter: (inch) 5/16" / (mm) 7.92Outer Diameter: (inch) 0.500 / (mm) 12.7Burst Pressure: (psi) 175 / (mpa) 1.21Working Pressure: (psi) 35 / (mpa) 0.24Bend Radius: (inch) 2.5" / (mm) 63.5Weight: (lb/100 ft.) 7.8 / (kg/m) 0.116Permeation Rate (Standard is (15g/m^2/24hrs (CE10)): 5.0*The #305 series exceeds ABYC H-24, SAE J1527, ISO 8469 B1, USCG Type B1-15