Feature: 1. Stainless Steel Construction: Boat porthole window is constructed with marine grade stainless steel for the entire frame and hinge, which ensures rust resistance and durability. Polished to a smooth finish. It can withstand harsh sea conditions. 2. 6mm Thick Smoked Tempered Glass: The porthole window features 6mm thick smoky tempered glass. Not only it ensures a robust structure, but it also filters harmful UV rays while letting light into the cabin, enhancing the room brightness. 3. 0‑180° Opening Degree: The boat opening portlight has an inner opening design with a fixed handle and a net provides a barrier. It can open at any angle from 0 to 180 degrees, with the stainless steel hinge able to support it at any angle, providing a perfect view of the journey. 4. Universal Fit for a Variety of Spaces: This portlight hatch is versatile and can be installed anywhere required, such as storage cabins, living areas, lounges, bathrooms. It is a great addition to enhance indoor lighting or serve as a ventilation window. 5. Easy Installation and Widely Applicable: The opening porthole can be installed on panels with a thickness of 26‑36mm. It is perfect for boats, yachts, ships, and RVs. It works great for your renovation and retrofit projects. Specification: Item Type: Boat Porthole Window Material: Stainless steel + tempered glass + ABS + rubber Switching Method: Internally open, includes stainless steel retaining clamp ring Window Dimensions: Approx. 345 x 150mm / 13.58 x 5.91in Installation Hole Size: Approx. 300 x 105mm / 11.81 x 4.13in (please allow a 2mm error for manual measurement) Suitable for Installation Thickness: Approx. 26-36mm / 1.02-1.42in Applicable to Boat, Yacht, Nautical, RV, it can be used for your ship, yacht, RV modification and installation projects, providing a solution for your water leakage, damage, and unsatisfactory windows. Package List: 1 x Boat Porthole Window1 x Fixing Frame Note: The installation difficulty is slightly higher. If you are not a professional, we suggest seeking professional engineers to assist with installation for better shopping experience