Rectangular electric opening comprising extruded aluminium UNI6060 natural alloy frame and counterframe, assembled for chamfering, complete with seal, aluminium hinges, and stainless steel rivets and screws. The opening device can be provided with a spring latch opening for the passage of persons or with worm screws. The zinc-plated steel latch element, zinc-plated steel support brackets and 2 gas springs can only be internal and activated by manually accessing the dome. The worm screw (300 mm stroke) can be actioned using the mobile pole with hook (lengths of 2 - 2.5 - 3 metres), and the support brackets are made of anodised aluminium. You can decide the side for opening (long side recommended).