Sturdy material and robust performance - Made of high quality ABS plastic with high strength and good toughness. It is anti-ageing, provides UV protection and heat resistance, and will not easily deform after long sun exposure. Excellent corrosion resistance makes it durable in rain and seawater environments. High shock resistance supports use on exposed locations such as ship decks. Anti-slip design - Circular non-slip inspection hatch with a square concave-convex surface. Non-slip and wear-resistant to prevent slips, while offering a luxurious visual and a comfortable touch. Edges are polished and smooth to avoid cuts. Easy to install and use - Removable round deck plate that requires no professional installation skills or tools. Can replace old devices directly. 180° opening flaps with independent cover and chassis allow vertical or horizontal installation. Includes 6 screws for easy attachment and removal. Excellent sealing performance - Rubber sealing ring and threaded design provide enhanced waterproof and dustproof sealing for the hatch deck plate. Applications and compatibility - Ideal for boats, ships, yachts, and other round deck hatch needs. Suitable for outdoor marine equipment and environments requiring reliable sealing, quick installation, and safe, non-slip operation.