The mechanism is made of 2 mm thick galvanized steel; it is equipped with two stainless steel springs; two EASY CLIP systems for quick installation and removal. Functionality: Opens slightly when the internal temperature rises to +17-25°C; Opens fully at +30°C; Closes when the temperature drops; Can open windows weighing up to 14 kg. Features: Innovative design, unique on the market; Quick installation and removal in two seconds; Durable construction for long-term use; This product is ideal for anyone looking for an effective ventilation solution for their greenhouse, with an emphasis on ease of use and durability.