Stable Construction: Crafted from PVC and ABS, these panels are resistant to moisture, deformation, and wear, ensuring long-lasting performance season after season. Easy to Install: Comes with a frame for simple mounting-no tools required. A hassle-free solution that fits most window AC units. Efficient Insulation: Made of fine insulated material, these panels help maintain indoor temperature by minimizing air leaks-lowering energy bills and enhancing cooling efficiency. Flexible Folding Design: The side panels feature a smart folding structure that allows flexible adjustment according to the size of your window air conditioner, ensuring a snug, gap-free fit. Most Use: Perfect for home, office, or shop settings. Works with a wide variety of window air conditioners with a size range of 10.9x13.7x12.8 inches.