The Soler and Palau PER-125 W plastic louvre back draught shutter is designed to prevent unwanted reverse airflow in ventilation systems. Made from durable plastic, it provides reliable performance while maintaining efficient airflow. The louvre design ensures smooth air passage and protects the system from external debris. Suitable for a variety of fan and ducting applications, this back draught shutter is an essential accessory for maintaining proper ventilation and system efficiency.