English: General Description Size Buying Guide: Please refer to the picture to measure the lengths of the three sides of windows A, B, and C to add them together, A+B+C=3.5~4 meters, choose 4m. This product provides excellent airtightness and is suitable for a wide range of uses, including portable air conditioners, tumble dryers, extractor dryers, and dehumidifiers. Technical Specifications Material: 90T Polyester, Waterproof PU Coated Fabric Closure: Self-locking Zipper Available Sizes: 3m, 4m Compatibility: Casement Windows Only Compatibility & Accessories Suitable for Portable Air Conditioners Compatible with Tumble Dryers Not compatible with sliding doors and windows Installation Easy to install with no drilling or tools required. Simply stick the adhesive tape to the inside of the window frame and to the window itself. Apply the window seal to the hook-and-loop tape, without hindering the opening and closing of the windows. Use: You can open or close the window at any time