Manual opening devices are made of aluminium profiles, moved by a screw jack which is actioned by a crank handle available in different lengths.
Depending on the size of the dome, it is possible to install one (single drive) or two (tandem drive) screw jacks connected to each other and actioned by a single crank handle.
Regarding tandem opening device, pushing points are placed on the long side of the dome.
For continuous skylights, manual opening device is available on 180 cm intermediate elements.