Attwood 316 Stainless Steel Alloy Flush Mount Fuel Vent - Straight Vent [66031-3]316 Stainless Steel Alloy Flush Mount Fuel Vent Straight Vent On the exterior, they have a smooth edge over the competition. Unlike some others, there is no protruding cap to cause damage or be damaged by hull bumps and scrapes. Cap unscrews with a hex head wrench for easy cleaning of the filter and pressure testing of the entire fuel system. These vents now include two silicone gaskets. Features: Straight Vent Specifications: Hose Size (inch): 5 8"