Sktlight mechanism Electric mechanism for the opening and closing of skylights UCS ULTRAFLEX CONTROL... 372-209 Suitable for tilt-and-turn and projected windows and skylights made of aluminum, wood, iron, and plastic. The mechanism housing is made of aluminum, and its internal mechanism consists of a single continuous chain. For the total chain stroke, there are two options: 250 mm and 380 mm, which can be selected during the connection of the mechanism. View