Features 1.Superior Rust Resistance: The deck fill cap is made of 316 stainless steel, providing exceptionally strong rust resistance. This allows it to be used in harsh saltwater environments. 2.Exceptional Durability: This replacement gas fill cap is incredibly sturdy and durable. Its strength and stability ensure its long term usability. 3.Convenient Size: With a diameter size of 38mm, the product has a convenient size that is suitable for various sizes of boats. It is also easy to install and maintain. 4.Secure and Leakproof: The boat fuel cap is designed to provide a secure and leak proof seal, preventing any fuel, water, or other liquids from escaping the tank. 5.Versatility: The replacement cap is not limited to use on fuel tanks alone. It can also be used on water tanks, waste tanks, or any other type of tank that requires a secure and durable cap. Specification Item Type: Boat Fuel Tank CapMaterial: Stainless steel 316Diameter: Approx. 38mm / 1.38inApplicable: Fit for marine yachts, fiberglass yachts, inflatable yachts, business yachts and other types of yachts. Package List 4 x Boat Fuel Tank Cap