Features: 1. General: Window ventilation kit includes 3 or 4 plates, 5.9 diameter coupler and screw fittings. Suitable for all air-conditioning exhaust hoses with a diameter of 5.9 inches. 2. Slide rail: The humanized slide rail design of the AC exhaust kit, the sealing plate is easy to slide, and the locking speed is fast. No tools are needed, and the length can be adjusted in 5 seconds. The adjustable length range is from 17 inches to 60 inches. 3. Vertical and horizontal use: Suitable for most vertical and horizontal sliding windows. You can use 2-plate combination, 3-plate combination or 4-plate combination according to the size of the window. It is very convenient to use anywhere. 4. Good airtightness: Embed the plate into the window rail and clamp it to achieve a good sealing effect, which can keep your room cool at all times, prevent air-conditioning from leaking, prevent hot air from entering, and save electricity. 5. Easy to install and disassemble: The window sealing kit is made of high-quality PVC and ABS, which is resistant to extrusion and aging, and can be used year after year. Simple and stable fixing method, convenient installation and disassembly. Easy to store and save space. 6. Note: The width of the window sealing plate is 16cm. Please purchase and measure the window size to confirm whether it fits. Installation Steps: 1. Measure the window size; 2. Adjust the length of the window sealing plate to adapt it to the size of the window; 3. After confirming the length of the window sealing plate, fix its length with screws. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Description: Material: ABS, PVC Size: As the picture shown Color/Style: As the picture shown combination: A-3pcs* window sealing plate 43-110cm, 1 x5.9inch round interface, 3pcs* butterfly buckle; B-4pcs* window sealing plate 43-140cm, 1 x5.9inch round interface, 4pcs* butterfly clasp. Package List: 1 set of Window Board Kit