Cord operated. For use with curtains 20 m W and 5 m H weighing not more than 20 kg. The curtain opening can be central, lateral,multiple or asymmetric. The system is suitable for ceiling installation. The operating cords run in independent side-by-side channels. For sliding the system uses: gliders with acetylic wheels (max. 30 kg x 7 m) gliders with ball bearings (max. 45 kg by 7 m).