Upgrade your boat with Attwood Vented Deck Filler Caps - the perfect blend of style and functionality. Crafted for Gasoline/Petrol, Diesel & Water, these caps come in various styles to suit your needs. Each cap features an ISO symbol for easy identification and a printed symbol on stainless steel caps for quick reference: Red for Petrol, Green for Diesel & Blue for Water. With screw open caps designed for easy handling and ribs for a secure grip, these fillers also include a key for Gasoline for effortless opening and tightening. Enhance your boat's look and performance with Attwood today.