Feature: 1. Push Pull Design: Rounded corner windows with sliding opening, making your camper cool in the summer and warm in the winter, providing a comfortable interior environment. 2. Waterproof: The frame of the window has a waterproof rubber ring to ensure a complete seal and waterproof performance, and there is a drainage hole under the frame to ensure the flow of rainwater. 3. Strong Strength: Push pull window frame is made of high strength aluminum alloy and glass, which is strong and safe, effectively resist UV, sound and heat. 4. Smooth Polished: The exterior of the window frame is polished smooth with a black powder coating to provide a good touch and resist oxidation, even in outdoor environments. 5. Application: Window can be used in storage compartments, living rooms, lounges or wherever windows are needed, and to enhance interior lighting or for ventilation. Specification: Item Type: RV Push Pull WindowMaterial: Aluminum alloy, rubber, ABS, tempered glassWindow Shape Size: Approx: 535x335mm/21.06x13.18in Installation Thickness: Approx: 5mm-7mm/0.2-0.27in or 53mm-54mm/2.08-2.12in sheet metal installation (there will be 2mm error for glue fixation)Installation Opening Hole Size: Approx: 500x300mm/19.68x11.81in, used for vertical or horizontal installation Application: Windows protect your privacy and ensure adequate sunlight does not heat the interior of your RV. Fully sealed windows keep your camper cold in the summer and warm in the winter Application: Suitable for camper, RV, engineering car and other any need for windows. Package List: 1 x Push Pull Window1 x Fixed Frame 1 x Package of Water Guide Hole Plug (Random Number)1 x Package of Fixed Screw (Random Number) Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. It is highly recommended to find a professional engineer to assist in the installation to ensure a perfect shopping experience.