Basement Sliding Window with Insect Screen - 8 cm wide aluminum alloy frame and 5 mm tempered glass for a lightweight, durable window that opens smoothly and includes a built-in fly screen. A reliable option for letting light and air into your space. Tempered Glass Upgrade - 5 mm tempered glass provides enhanced impact resistance, better noise reduction, and improved safety. Special sizes are available; send exact measurements to receive a matching replacement window. Basement Ventilation and Air Quality - Aluminum sliding window with a fly screen delivers excellent ventilation and optimal air circulation underneath your building. Sliding operation helps improve air quality in basements and other enclosed spaces. In-wall (Flush) Installation - The package includes a tempered glass window and a screw set. When you receive the package, fit the window into the window opening, screw the top portion of the frame, and seal the gap with foam adhesive. This makes it a straightforward DIY project for most homeowners. Use scenarios - Basements and crawl spaces: Improve ventilation, reduce humidity, and introduce daylight without compromising security or airflow control. - Renovations and new builds: Ideal for installations where a flush, in-wall appearance is desired and quick on-site assembly is helpful. - Utility rooms and under-house spaces: Create better air exchange in enclosed or difficult-to-ventilate areas while keeping insects out.