Universal Fit for Mobile AC Units: Our window seal is tailored for windows with a perimeter measuring up to 400cm. Simply sum up the lengths of all four sides (A+B+C+D) of your window frame-ensuring the total doesn't exceed 400cm. Effortlessly install in just 10 minutes by adhering the included tape to your window frame and attaching the seal. Optimal Heat Blockade: Engineered with a dual zipper system, it creates an airtight bond between your window and frame. This enhances the retention of cool temperatures indoors, reducing energy wastage, and cutting down on electricity bills. Plus, enjoy flexibility as opening and closing the window doesn't disrupt its efficiency. Robust Dual Zipper Design: Compatible with all single-hose air conditioner models, our innovative double-mount design securely fastens the exhaust pipe in place using cable ties bundled with the product. Experience uninterrupted performance without the need for frequent adjustments throughout the day. Weather-Resistant Fabric: Crafted from premium 210D polyester, this window seal is not only waterproof but also UV-resistant. Its durability allows use in any weather condition, including rainy days. Moreover, the light-colored fabric minimally impacts room brightness, suiting both daytime and nighttime use. Easy Installation Guidance: Follow our straightforward installation steps, starting with measuring your window's perimeter, applying the adhesive tape, and finally securing the window seal to ensure a comfortable, cooled environment all year round.