Grilles are available in a variety of choices.  The most popular are the aluminum grilles because of cost efficiency and they enable you to paint them any color to match the interior of your specific boat.  On the more elegant side we have Teak, Mahogany, and Oak grilles.  Plastic registers are also available in 4" only.  All registers come with Four Way Deflection, moveable louvers, and completely open and close.  Custom registers also available.