This antique diving helmet is a full-size replica of the US Navy Mark V model and is perfect for maritime enthusiasts and collectors. Made with high-quality materials such as bronze, aluminum, brass, glass, iron, copper, and steel, this helmet is a unique addition to any collection. The helmet is an antique reproduction and is a perfect representation of the US Navy during World War II, making it a great piece of history to display. It measures 18 inches and is sure to be a conversation starter in any room.