Quality : Built with premium ABS material, this boat hatch showcases meticulous craftsmanship. Its anti-slip design adds durability and resists harsh UV rays, corrosion, and aging. It's designed aptly to handle the demands of different marine environments, providing a reliable solution to maintain your boat parts. Wide Application: The simplistic installation process makes this boat hatch cover a practical choice for various indoor and outdoor applications. Versatile in nature, it can be fixed at ease on a yacht, RV, or truck, offering a useful accessory for travel enthusiasts or those with a penchant for outdoor activities. Value-Packed Bundle: Each set includes 3 premium boat hatches and 18 stainless steel mounting screws for convenient setup and secure attachment. Be it a vertical or horizontal hatch, this package offers an array of replacements keeping your marine equipment accessible, well-maintained, and safe. Dimensional Accuracy: The marine hatch measures 5.6 inches externally and 4.0 inches internally. This compact size ensures a reliable sealing mechanism with a rubber O-ring inside that prevents water ingress into your cabin. It assures safety and keeps your cabin dry and comfortable. Easy to Operate: These sailboat accessories come with a simple turn-to-open mechanism. Rotate the hatch clockwise to close and in the opposite direction to open. With a detachable cover, opening, and closing the hatch is effortless. For installing the 4-inch marine inspection hatch cover, a 4.5-inch hole is recommended. There may be slight color difference or difference between the actual product and it does not affect the use. Colour:White Material:plastic Package Contents: 3 x Inspection hatch with Screw Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.