[UPGRADE DESIGN] This latest window vent kit features a 2-in-1 coupler design. The inner buckle fits a 5.1-inch diameter exhaust hose (for clockwise or counterclockwise use), and the external buckle fits a 5.9-inch diameter exhaust hose (counterclockwise only). [GOOD SEALING] This third-generation version upgrades the sliding rail construction. The plate can be fully embedded into the window track to achieve a tight seal, helping maintain comfortable indoor temperatures, improve cooling efficiency, and save energy. [WIDE COMPATIBILITY] This window sealing kit is compatible with most vertical and horizontal sliding windows. It includes 4 seal plates with an adjustable range from 17 to 61 inches, suitable for various sliding window and door configurations. [EASY TO INSTALL] This portable AC window kit is made of durable PVC material that does not degrade over time. No tools are required for installation or removal. Simple to set up, reusable, and convenient for seasonal use. Specifications: Material: PVC Color: White Package Contents: 4 x Window Seal Plates 4 x Screws 2 x Sealing Tapes 1 x Coupler Note: Light reflection and differences in display screens may cause slight variations between the color shown in the image and the actual product. Measurement may vary by up to 1–3 cm due to manual measuring.