Cord operated. For use with curtains 600 cm w max. and 300 cm h weighing up to 5 kg. The opening can be central, lateral, multiple or asymmetric. The system is suitable for ceiling installations using inset steel keys. The operating cords run in independent side-by-side channels. Sliding is guaranteed by self-lubricating polyethylene slides or by roller gliders for curtains at the load limits.