1. Flexible Adjustment: The aluminum frame for concession windows offers 155 standard size options. The sliding aluminum frame with an integrated screen utilizes a dualtrack gliding system, enabling largearea ventilation. This design promotes fresh air circulation in basements or enclosed spaces, effectively improving indoor air quality while maintaining comfort and style. 2. Material Composition: The aluminumframed concession window features a 4.3 cm wide aluminum alloy frame paired with 5 mm thick tempered glass, providing a lightweight yet exceptionally strong design. The weatherresistant sliding system ensures longlasting performance, while the tempered glass offers impact resistance, transparency, and scratch resistance—delivering reliable protection and natural light for any indoor or outdoor setting. 3. AllScenario Compatibility: The aluminum alloy mobile home enhances comfort in various environments, including residential basements, retail stores, and food stalls. Its robust weather resistance makes the flushmounted concession window suitable for humidity areas like basements and open garages, providing essential ventilation and lighting while ensuring protection in diverse conditions. 4. DualTrack Sliding System: The commercial foldable doublehung window employs a dualtrack system for smooth sliding movements. The window sashes can stop at any position to precisely control airflow. In summer, the commercial replacement aluminum promotes natural air circulation, while in winter, it forms an insulating barrier when closed—offering yearround usability and smart adaptability to the environment.