1、Sturdy Material: The frame of the round corner window is made of high strength aluminum alloy, coated with black powder to ensure wear resistance and oxidation resistance, long service time in the outdoor environment. 2、Water Resistant Window: The fixed window is equipped with water resistant rubber ring to ensure complete sealing and water resistant performance to keep your RV cool in summer and warm in winter. 3、Tempered Glass: The 4mm thickness black tinted glass ensures the overall robustness and safety, and the colored glass effectively resisting heat to prevent overheating RV inside. 4、Easy to Install: With attached retaining rings and screws, with no exposed external fasteners, make the external lines of the window more smooth and provide a solution for your leaking, broken and unsatisfactory window or broken walls 5、Various Uses: The replacement window is suitable for storage compartments, living rooms, lounges, also for trailers, RVs, construction vehicles, for repair and refit.