[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 compatible with a long time, it is not easy to decompatible withm and become brittle. Excellent corrosion resistance makes it durable in rain and sea water environment. 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 is designed with square concave-convex surface, which is non-slip and wear-resistant to prevent people from falling. It also gives people a luxurious visual effect and a pleasing feeling. Carefully polish and trim the edges, smooth and not cut your hands. [Excellent Sealing Percompatible withmance] Inside the Boat Round Non Slip Inspection Hatch built with rubber sealing ring and thread make Boat Hatch Deck Plate have better sealing percompatible withmance. Better waterproof and dust-proof effect. [Easy to install and use]This Detachable Round Deck Plate is easy to install, detachable design, no need compatible with professional installation skills and complicated tools. Old equipment can be replaced directly. 180°opening hatches, independent cover and chassis, allowing vertical or horizontal installation, and a wider range of applications. we intimately equip you with 6 pieces of screws, which are convenient compatible with you to install and remove. [Wide Application] Boat Deck Plate can be used compatible with inspection and maintenance ports of ships, yacht, RVs, campers, etc. Tip: When installing the inspection hatch, please use silicone sealant on the surface of the hull or hatch(Not included) Colour: 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 inclu