Attwood Marine - Fuel Tank Vent - 5/8" - Black - 16073. Patented splash-resistant, corrosion-resistant polypropylene. Meets ABYC ventilation specifications. All Attwood fuel tank vents meet or exceed U.S. Coast Guard regulations.. Features:. Hose - 5/8". Max Hull Thickness - 7/8". Hole - 3/4". Color - Black