Premium Quality Materials: Our auto vent opener automatic greenhouse window opener is made from yet aluminum alloy, ensuring extended service life and superior resistance to wind, moisture, and rain damage. Perfect Load-Bearing Capacity: Greenhouse vent automatic opener solar heat sensitive auto vent opener , delivering optimal ventilation to enhance plant growth. Effortless Installation: Greenhouse automatic roof vent opener. Simply secure the cylinder, adjust its position well, and mount on a sun-exposed area of your greenhouse frame using clamps or screws. Versatile Applications: Automatic greenhouse vent opener automatically adjusts ventilation based on sunlight intensity because of indoor high temperature, greenhouse vent opener is ideal for cooling greenhouses in summer and boosting growth efficiency for flowers, organic vegetables, berries, potted plants, and more. Perfect for home gardening, remote farms, smart agriculture zones, sustainable energy projects, industrial greenhouses, farm ventilation, and educational institutions and so on. Color:Silver Material:Aluminium Package Contents: 2 * Auto Vent Opener Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.