Replacement parts for the two greenhouse window opening cylinders, featuring automatic opening based on temperature and sunlight sensors.

This is a replacement cylinder for an automatic greenhouse vent opener. It is highly sensitive and automatically responds to climate changes, so you don't need to be near the greenhouse. It is solar-powered, requiring no electricity, and automatically opens or closes the greenhouse vents when the temperature rises or falls. This automatic greenhouse vent opener is suitable for most greenhouses and can automatically open or close the vents. It not only saves time and effort but also provides better temperature conditions for plant growth. Specifications: Condition: Brand New; Temperature Range: 20~25℃ / 68~77℉; Dimensions: 33 * 1.5 cm / 12.99 * 0.59 inches; Color: Black + Silver; Material: Stainless Steel + Plastic; Package Contents: 2 Ventilation Openers. The above only includes the package contents and does not include other products. Note: Light during photography and different monitors may cause the color of the item in the picture to be slightly different from the actual product. Measurement error is +/- 1-3 cm.