Enhance your greenhouse ventilation system with this high-sensitivity Replacement Cylinder for Automatic Window Openers. Designed to respond automatically to weather changes, this non-electric window opener uses solar energy to open or close greenhouse vents as temperatures rise or fall, providing optimal growing conditions for your plants without the need for manual intervention. Key Features: · Automatic Temperature Response: The cylinder reacts sensitively to temperature fluctuations within the range of 20-25℃ (68-77℉), ensuring timely ventilation adjustments to maintain a healthy greenhouse environment. · Solar-Powered Operation: Completely non-electric, this window opener harnesses solar energy to function, eliminating the need for batteries or external power sources, making it eco-friendly and cost-effective. · Wide Compatibility: Suitable for most greenhouses, it automatically opens or closes windows up to 14 kg in weight, with an adjustable length ranging from approximately 33 to 45 cm (13 to 18 inches) and a maximum opening distance of about 45 cm (18 inches). · Durable ABS Construction: Made from high-quality ABS material, this replacement cylinder is built to withstand outdoor conditions while providing reliable performance over time. · Time and Labor Saving: Automating window ventilation reduces the need for constant monitoring and manual adjustment, allowing you to focus on other important gardening tasks. · Compact and Lightweight: Measuring approximately 33 x 1.5 cm (12.99 x 0.59 inches) and weighing around 117g, it is easy to install and handle. Specifications: · Condition: 100% Brand New · Material: ABS · Color: Black · Temperature Range: 20-25℃ / 68-77℉ · Size: Approx. 33 x 1.5 cm / 12.99 x 0.59 in · Weight: Approx. 117g · Maximum Opening Distance: Approx. 45 cm / 18 in · Adjustable Length: Approx. 33-45 cm / 13-18 in · Application: Suitable for windows under 14 kg Package Includes: · 1 x Replacement Window Opener Cylinder This Replacement Cylinder for Automatic Window Openers offers an efficient, eco-friendly solution to maintain ideal temperature conditions in your greenhouse. Its solar-powered, automatic operation ensures your plants receive proper ventilation effortlessly, saving you time and enhancing plant growth.