This air-operated damper is designed for tube fans with a size 355 configuration, offering precise and reliable control of airflow in ventilation systems. Made from durable materials, it ensures smooth and consistent operation while maintaining optimal system efficiency. The damper is easy to install and integrates seamlessly with existing ductwork, making it suitable for both commercial and residential applications. It provides an effective solution for regulating airflow and supporting the long-term performance of ventilation systems.