This vintage boat deck mount gas tank cap screw-on is a rare find for any boat enthusiast. Made in the United States, this brass and bronze cap is a true gem for collectors. With its intricate design and durable construction, it is sure to add a touch of elegance to any boat. This item is perfect for those looking to restore their vintage boat to its original state. It comes with no warranty and is sold as-is. The manufacturer part number is unknown, but it is sure to fit most boats. Add this unique piece to your collection today and enjoy the charm it brings to your vessel. THE CAP MEASURES ABOUT 4" TOTAL IN DIAMETER INCLUDING THE TRIM RING AND ABOUT 2 1/8" ACROSS THE OPENING UNDER REMOVABLE SCREW-ON CAP.