90° P-Trap Fuel Tank Vent –  Black with Black Vent HeadThis Attwood 90-Degree P-Trap Fuel Tank Vent reliably helps prevent water from entering the fuel tank while still allowing air to vent freely during normal sea conditions and washdowns. This vent’s effectiveness eliminates the need for an anti-siphon loop in the vent hose. It requires a ¾-inch installation hole and can be used with a maximum hull thickness of 9\/16 inches.  Features:Standard Mount – (inch) 5\/8\