90° P-Trap Fuel Tank Vent - Flush Mount - Black with Stainless Steel 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. This is a flush mount vent for use with a 5/8-inch interior diameter hose. It requires a 1-3/8-inch installation hole and can be used with a maximum hull thickness of 1 inch.Features:This black vent with a stainless steel vent head meets ABYC standardsFlush Mount - 5/8" I.D. hose(inch) 1-3/8" install. hole size(inch) 1" Max. hull thickness*Compatible with Ethanol blended fuels