High Mirror Polished and high strength marine grade stainless steel key cap deck filler for fuel gas - Durable corrosion resistant construction: high strength stainless steel with a mirror finish designed for marine environments, delivering long-lasting performance and easy maintenance - Easy to install and secure: simple installation with a reliable key cap design to help prevent leaks and unauthorized access - 38 mm size compatibility: listed as 38 mm (1.5 inch / 2 inch) deck filler, suitable for common fill openings while maintaining a clean, professional look - Universal fit for internal and exterior use: engineered for versatile installation on both indoor and outdoor deck surfaces - Versatile labeling options: supports water, waste, or diesel applications or can be customized with laser logo words for branding or identification - Broad application range: suitable for marine boats and yachts as deck fuel fill caps, as well as trucks, vans, caravans, and trailers Use scenarios - On a marine boat or yacht, install this deck filler as the primary fuel cap for a secure, corrosion-resistant fill point; the key cap provides added security and cap retention in harsh saltwater environments - On an RV, caravan, or trailer, use the filler for external fuel or diesel filling points or for a labeled water/waste/diesel access point, with the option to add a customized laser logo for identification - On trucks or commercial vehicles, deploy as a robust deck filler cap for fuel or diesel needs, offering universal fit for external mounting and the flexibility to tailor branding or function through laser-etched words