Versatile use This rectangular porthole window is suitable for boats, yachts, RVs, and industrial vehicles. It provides a practical and stylish addition to any vessel or vehicle. Durable PP construction Made from sturdy PP material, the porthole resists aging and sun exposure. It is built for long term use even in harsh marine environments. glass The window features 4 mm tempered glass for strength, clear viewing, and chemical resistance. You can enjoy a clear view without worrying about damage or wear. Easy to operate and protect The easy to click two part structure allows the window to be loosened and opened easily. It uses wear resistant synthetic parts and waterproof rubber seals to improve protection against the elements. Key benefits at a glance Provides ventilation and natural light while maintaining water resistance and safety Durable materials designed to withstand sun, salt spray, and harsh environments Easy operation with secure sealing and low maintenance Specifications and features Material: PP construction Glass: tempered 4 mm (0.15 inch) Style: rectangular porthole window Opening mechanism: two part structure, easy to loosen for opening Seals: waterproof rubber seals Applications: boats, yachts, RVs, industrial vehicles Use scenarios Sailboat or yacht cabin: adds ventilation and a clear view while preserving watertight integrity Recreational vehicle or camper: enhances interior light and airflow without compromising exterior weather sealing Industrial vehicle or utility truck: improves cabin ventilation and visibility in challenging working conditions