Feature 1Secure and Convenient: Equipped with a safety lock and matching key, it provides secure and convenient access to your storage space. It is perfect for RVs, campers. 2Large Capacity: With large opening and secure lock, can accommodate large items and ensure the safety of your belongings, can be installed horizontally or vertically. 3Excellent Seal Design: Equipped with sealing strips, it ensures complete sealing, waterproofing, and great shock absorption. It also offers excellent insulation and soundproofing performance. 4Easy to Use: With a 500x500mm size design that can be opened up to 0180 degrees, it offers easy access for storing larger items. The exterior design has no external fasteners for a sleek look. 5Material: Made with a heavy duty aluminum alloy frame and ASA panel with high UV resistance and surface electrostatic spraying, it has excellent anti corrosion and anti rust performance.Item Type:MarineAccessHatchMaterial:Aluminum alloy + rubber + ASAHatchSize: Approx. 520x520mm/20.47x20.47in .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Installation Opening Size: Approx. 500x500mm/19.69x19.69in,R70-4Applicable Mounting Thickness: 25-55mm/0.98-2.17inApplication: Suitable for RVs, campers, etcPackage List1 x MarineAccessHatch2 x KeyNote1. Manual measurement, please allow 3mm error2. Professional installation is highly recommended, please look for professional engineers to assist in installation to get the best shopping experience3. Please confirm that it is the correct size you need before purchasing