Made from billet brass material hose ends are -3 AN with a 7/16" wrench hex which is common to most fuel system hoses. The hose barb has four barbs that once you slide the hose and crimp a ferrule on it the hose will be good for high pressure fuel systems that run over 250 pounds of line pressure.
RBS also carries bulk rubber hose, crimp ferrules, or a hose crimper that will help put the racer in the winner's circle. Hose end/barb are sold each. Line nut and barb weight four ounces each.