Aluminum Alloy Material: Made of high-quality aluminum alloy material, lightweight, corrosion-resistant and sturdy Anti-slip Pad: The built-in anti-slip pad design increases the friction between the stopper and the window frame, ensuring that the stopper is more stable during use Easy Adjustment and Installation: Equipped with a special adjustable key, the installation process becomes simple and convenient. without drilling or using complex tools. Freely Control the Width of The Window: The clever design allows users to freely adjust the width of the window opening, ensure the necessary ventilation, and effectively prevent accidental falls and ensure family safety. SHOP WITH CONFIDENCE: To provide you with the highest quality service, If you have any question, please contact us.We will provide after-sales service ., Manufacturer: DONGKER