Feature: 1. Push Pull Style: Sliding opening for enhanced interior light or ventilation, keeping your camper cool in the summer and warm in the winter. 2. Unique Design: The inner frame has 3 modes of application for insect protection, privacy, or full opening, and can be used in hatches, living rooms, lounges, or anywhere a window is needed. 3. UV Resistant: Upgraded design ensures that the windows are strong and secure overall and is resistant to UV rays, sound and heat. 4. Waterproof: The window frames have waterproof rubber rings to ensure complete sealing and waterproof performance, and drainage holes under the frames to ensure rain water run off. 5. Anti Oxidation: Round corner sliding window is made of high strength aluminum alloy and tempered glass, and the frame exterior is black powder coated to ensure resistance to oxidation. Specification: Item Type: RV Camper WindowsMaterial: Aluminum alloy, rubber, ABS, tempered glassWindow Shape Size: Approx: 530x330mm/20.86x13in Installation Opening Size: Approx: 500x300mm/19.68x11.81inApplication: Windows protect your privacy and ensure adequate sunlight does not heat the interior of your RV. Fully sealed windows keep your camper van 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 RV Camper Window1 x Inner Frame 1 x Fixed Frame 4 x Long Screw 10 x Short Screw 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. If you are not a professional, please suggest finding a professional engineer to assist in the installation to ensure a perfect shopping experience