This Ultrasound Lightline Venetian is the first generation 25mm venetian where the lift cords do not pass through the slats, but run behind and in front of them, so there are no cord holes in the slats. There are great many advantages to this method. As with all Ultrasound venetian blinds are still superbly attractive but provide much greater privacy. Even more, the Ultrasound Lightline Venetian will also keep the sun out more effectively but closes even better. We lose the holes and we lose the irritating lines of light that are now a thing of the past.