General description Automatic Greenhouse Double Spring Window Opener designed for efficient ventilation in your greenhouse. This solar heat-sensitive opener automatically adjusts the window opening based on temperature, ensuring optimal conditions for your plants. Technical specifications Maximum window opening height: about 45 cm Full opening temperature: about 30° (depending on setting and load) Regulated opening temperature: 16°-25° Maximum weight of vents: not exceeding 7 kg (15 lb) Color: Black and silver Material: Aluminum alloy Measurement allowed error: +/- 1-3 cm Usage Ensure the greenhouse window opens normally for effective operation. In summer, place the black bar in the refrigerator for at least 5 minutes to allow the cylinder to fully retract before assembly. Other information Package Contents: 2 x Automatic Window Opener Kit Note: Light reflection and different displays may cause the color of the item to differ slightly from the actual product.