A. Boat deck fuel filler/ filling port (keyless version) - 1/2 inch (38 mm) - Marine-grade 316 stainless steel suitable for water, wastewater, and gas. B. It has been carefully polished to present a mirror finish. C. Suitable for fuel tanks of boats, yachts, RVs, campers, motorhomes, trucks, tractors, and trailers. D. It shows relatively strong corrosion resistance and durability in salt - water environments. E. It is quite convenient with a keyless design - Lift the tab and turn to open or close (comes with a connecting chain). F. Specifications: - Color: Silver - Material: 316 stainless steel G. Package contents: - 1 keyless boat deck fuel filler H. Precautions: - Due to manual measurement, there may be a 1 - 3 mm error. (1 inch = 25.4 mm) - Due to display differences, the product color may vary slightly from the online display.