1-3/3 C-shaped and Z-shaped Louvre Blades ALB > Area(<=)As per structural requirements DriveWithout Surface finishesPowder Anodised Paint ALB – Passive > Area(<=)As per structural requirements DriveWithout Surface finishesPowder Anodised Paint Large fixed louvre blade systems ALB – Active linear > Area(<=)As per structural requirements Drive230V/50Hz 24V Surface finishesPowder Anodised Paint Large active louvre blade systems 1-3/3