SeaMark Internal Flange for Mushroom Vent 150mm

Internal flange designed to fit SeaMark's Plastic Mushroom Vent system. This component sits flush within your cabin or deck opening, providing a neat, finished appearance. Once installed, it projects just 23mm inward, minimizing obstruction. The 150mm overall width accommodates standard vent openings, while the 96mm centre hole aligns perfectly with the vent body. Essential for a professional installation that keeps moisture and debris out while maintaining proper ventilation.