The item is a boat fuel deck filler, also known as a fuel filler neck or fuel plate. It is typically made of stainless steel or chrome-plated material and is used to fill a boat's fuel tank. Helpful information: It fits a standard fuel hose. It may be suitable for use with E10 Bio-Ethanol fuel. It is installed on the deck of a boat. It can be found in chrome, brass, or aluminum. It connects the fuel tank to the fuel filler inlet. It may have a dual paint coating to protect against corrosion. It may have a locking or non-locking format. It may have a capless or easy-fuel system.