Ingenious fitting combines the gasoline fill with a tank vent.The Perko Gas Fill and Tank Vent is a plastic deck fill that has a vent with a flame arrestor integrated into the fill flange. A flip-up cap eliminates the need for a deck key and no ground wire is required.Key FeaturesMeets USCG safety standardsFor 1-1/2" fill hose and 5/8" vent hoseUse #10 screws, which are sold separately