Weather tight seal Our Marine Deck Cover features an O-ring sealed design that keeps moisture out in both interior and exterior applications. This lid helps protect your boat or RV from water ingress, even in challenging conditions. Robust construction The deck plate is built with a strong ABS molded design that stands up well to aging and UV exposure. The durable construction helps extend the life of your marine or RV equipment. Easy installation Produced with professional-grade manufacturing, this yacht deck lid is designed for straightforward replacement. Its simple installation process makes it a reliable choice for boaters and RV owners looking for a hassle-free fit. Versatile application This four-inch deck cover fits a wide range of needs on yachts, boats, and RVs. It provides an effective and simple solution for deck entry and inspection, with reliable weather protection. Specifications and compatibility - Size: four-inch deck plate - Material: ABS molded construction - Function: weather-tight deck lid for interior and exterior use - Performance: O-ring sealed for moisture resistance Use scenarios - On a coastal cruiser, use this four-inch deck cover to seal an entry hatch during waves and rain, keeping the cabin dry. - At a marina, replace a damaged deck plate on a small yacht or runabout to maintain a watertight deck hatch during inspections. - For an RV with exterior storage access, install this lid to protect the storage bay from rain and spray when parked or traveling.