Feature: 1. Excellent Seal Design: Equipped with sealing strips to ensure a complete seal and waterproofing, as well as great shock absorption performance. 2. Hatch Design: With a 700x400mm large cargo compartment, it can store larger items and the cover can be opened up to 0‑180 degrees. 3. Improved Exterior Design: The boat deck hatch has no exposed external fasteners, giving a smoother exterior look to your RV. 4. Secure Lock: Equipped with a safety lock, provides a secure way to lock the compartment cover to prevent unwanted intruders and ensure peace of mind. 5. Material: Made of heavy duty aluminum alloy frame and ASA panel, electrostatic spraying, is anti erosion and rustproof. Specification: Item Type: Marine Access Hatch Material: Aluminum alloy + rubber + ASA Hatch Size: Approx. 720x420mm/28.35x16.54in Installation Opening Size: Approx. 700x400mm/27.56x15.75in, R70-4 Applicable Mounting Thickness: 22-55mm/0.87-2.17in Application: Suitable for RVs, campers, etc. Package List: 1 x Marine Access Hatch2 x Key Note: 1. 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