The Soler and Palau PER-250 W plastic louvre back draught shutter is designed for use with 250mm diameter ventilation systems. Its louvre design allows efficient airflow while preventing reverse air movement when the fan is not in use. Manufactured from durable plastic, it provides a lightweight yet reliable solution for maintaining system efficiency and protecting against unwanted drafts or external debris. Suitable for commercial, residential, and industrial applications, the PER-250 W is a practical accessory that enhances airflow control and overall ventilation performance.