Perko Chromalex cowl vents provide fresh air below decks by trapping air that comes across the top deck and then forcing it down below. They feature a vibrant chrome plated zinc cowl with black plastic base.

A 3 inch duct threads into the neck collar without the need for hose clamps. Mouth opening is 7 inches wide providing excellent ventilation, and vents are mounted using standard #8 screws.