This 17 inches Canal Boat Porthole Window Glass with a Nickel Finish is a beautiful addition to any maritime collection. The Primary Material used in making this vintage reproduction is Brass and Glass. The Porthole Window Glass is a Type of window that was commonly used in the United States Navy during World War I. It is a Handmade piece with intricate details that are sure to impress. This item is perfect for those who are interested in antiques and maritime collectibles. The California Prop 65 Warning does not apply to it. This is truly a unique item that will add character to any wall it is placed on.