CLEAR IDENTIFICATION MARKINGS: Designed with bold lettering on the cap, this filler port allows for quick and easy identification of its function, improving operational convenience and reducing errors. POLISHED SURFACE FINISH: Featuring a high-gloss polished finish, the surface is smooth, burr-, and visually refined, allowing for direct replacement of old deck filler ports without aesthetic compromise. WIDE MARINE APPLICATION: This 50mm deck filler port fits most marine setups and is ideal for yachts, boats, RVs, and trailer tanks, offering easy installation and reliable performance across a variety of vessels. SECURE CHAINED LID: Equipped with a stainless steel bead chain, the cap stays securely attached to the main body, effectively preventing loss during operation or maintenance at sea. This stainless steel deck fill is designed for use with boats and other vehicles requiring secure filling ports. It is suitable for fuel or water tank applications and can be used on boats, yachts, caravans, campers, RVs, trucks, and tractors. The stainless steel construction supports durability in marine and outdoor environments., Manufacturer: ZHIDAISHI