[Sturdy Material] Made of high-quality and durable ABS engineering plastics. It has excellent characteristics such as high strength, good toughness, anti-aging, anti-ultraviolet, and good heat resistance. Even if exposed to the sun for a long time, it is not easy to deform and become brittle. Excellent corrosion resistance makes it durable in rain and sea water environments. High impact resistance also allows it to be installed in places exposed to heavy treads, such as ship decks. [Anti-Skid Design] Circular non-slip inspection hatch features a square concave-convex surface, which is non-slip and wear-resistant to help prevent slipping. The surface provides a pleasing visual effect. Edges are carefully polished and trimmed for smoothness and safety. [Excellent Sealing Performance] The boat round non-slip inspection hatch includes a rubber sealing ring and threaded design, offering improved sealing performance. Provides better waterproof and dust-proof protection. [Easy to Install and Use] This detachable round deck plate is easy to install with no need for professional skills or complicated tools. Can directly replace old equipment. Features a 180 opening design with independent cover and chassis, allowing for vertical or horizontal installation and broader application. Includes 6 screws for convenient installation and removal. [Wide Application] Boat deck plate is suitable for inspection and maintenance ports on ships, yachts, RVs, campers, and similar applications. Tip: When installing the inspection hatch, apply silicone sealant on the surface of the hull or hatch (not included). Color: White / Black Material: ABS Size: Inner Diameter: 6 inches, Outer Diameter: 7.8 inches, Cutting Size: 6.35 inches. Inner Diameter: 4 inches, Outer Diameter: 5.5 inches, Cutting Size: 4.4 inches. Package Contents: 1 x Deck Cover Only the above package content; other products are not included.