Here is a stainless steel deck mounted vent that was salvaged from a fishing boat. This vintage Attwood scoop fits 3" hose. Has a nice shine though does have some scratches and light bubbling.  Please note that the top 2 mounting holes have very small cracks as shown in the last picture. Please check out my other items.  Questions cheerfully answered.  Please add me to your favorites.  Your satisfaction is very important to my sleep. If there is ever a problem, mistake or misunderstanding I will do my very best to regain your trust.