1Vertical Operation: Rounded corner window adopts the pull lift type opening, and the single side glass lifts to open and close, keeping your camper cool in the summer and warm in the winter. 2Durable Structure: The overall frame of the rounded window is made of high strength aluminum alloy, and the exterior of the frame is black powder coated to ensure resistance to oxidation, even in outdoor environments. 3Waterproof Design: Window frames have waterproof rings to provide a complete seal and waterproof performance, and drainage holes underneath the frames to ensure rainwater runs off. 4Uv Resistance: The 4mm thick black tempered glass ensures overall sturdiness and safety, and the tinted glass protects against Uv rays and heat to prevent overheating inside the compartment. 5Wide Application: Professional window can be used in storage compartments, living rooms, lounges or anywhere a window is needed, also can be used to enhance the brightness or ventilation of the room.