Features: Made of quality material, durable, solid and convenient to use. As the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating. Non-electric, uses solar energy, open or close the greenhouse vents as temperature rises or drops. Ideal for your greenhouse window. The temperature is automatically adjusted from 15 to 25 °C. Specifications: Item Type: Greenhouse Winder Opener Cylinder Color: Sliver + Black Temperature range 15°- 25°/60°-77F Support rod total length: 33.5cm / 13.19 inch (appr.), the largest diameter: 1.5cm / 0.59 inch (appr.) Double spring window opener (closed state) total length: 32cm / 12.60 inch (appr.) (Open state) width: 24.7cm / 9.72 inch (appr.) Package List: 1 x Greenhouse Winder Opener Cylinder Notes: Do not use this opener cylinder anywhere the temperature will exceed 50° (122F). Do not dismantle the cylinder. This products need to be refrigerated before use it. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Features Durable and Convenient: Made of high-quality materials, this automatic roof vent opener replacement cylinder temperature sensor is built to last, ensuring long-term use and convenience. Optimal Growing Conditions: With its automatic temperature adjustment feature, this sensor helps maintain the ideal growing temperature in your greenhouse, preventing overheating and ensuring the best conditions for your plants. Solar-Powered Efficiency: This non-electric sensor utilizes solar energy to open or close greenhouse vents as the temperature rises or drops, providing efficient and eco-friendly operation. Perfect for Greenhouse Windows: Designed specifically for greenhouse windows, this sensor is an ideal choice to ensure proper ventilation and temperature control in your greenhouse. Adjustable Temperature Range: The temperature is automatically adjusted between 15 to 25 °C, allowing you to customize the settings to suit your specific greenhouse needs.