Marine Grille Kit for Control 30 Loudspeaker. Retrofit grille, adds extra durability when installing Control 30's in challenging corrosive environments such as cruise ships, sea-side restaurants, resorts in salt-air areas, water parks and swimming facilities. Kit includes extra-thick painted aluminum grille with WeatherMax backing plus stainless steel grille screws and protection caps for baffle screws. Black. Sold and packed as Eaches