Features: 1. Excellent Performance: Replace your old window opener with our highly sensitive and responsive cylinder. It automatically adjusts to weather changes, allowing you to step away from your greenhouse with peace of mind. 2. Convenient and Durable: Crafted from high-quality materials, our greenhouse window opener is built to last. It offers a seamless and user-friendly experience, allowing you to easily maintain the perfect temperature for optimal plant growth. 3. Use Solar Energy: Harness the power of the sun to effortlessly control your greenhouse vents. Our non-electric cylinder automatically opens or closes the vents as the temperature fluctuates, ensuring an ideal environment for your plants. 4. Easy Installation: Installing our greenhouse window opener is a breeze. It can be clamped or screwed onto your greenhouse frame with ease. No complicated setup or technical expertise required. 5. Automatic Temperature Regulation: Say goodbye to manually adjusting the vents! Our window opener responds to changes in temperature, ensuring a consistent and ideal climate inside your greenhouse. Specifications: Condition: 100% Brand New Material: ABS Color: Black Temperature Range: 20-25℃ / 68-77℉ Size: Approx. 33 x 1.5cm / 12.99 x 0.59in Weight: Approx. 117gMaximum Opening Distance: Approx. 45 cm / 18inAdjustable Length: Approx. 33-45cm/ 13-18in Application: For Under 14 Kg Window Package Included: 1 x Window Opener Cylinder Only Note: 1. Please allow 0-2cm error due to manual measurement. Thanks for your understanding. 2. 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.