Automatic Greenhouse Opener, Solar Heat Sensitive Automatic Vent Opener, Double Spring Aluminum Ventilation Opener, Temperature Controlled Automatic Window Opener

1. [Solar Powered] A heat-activated mechanical system that requires no batteries or electricity and uses solar energy to open or close greenhouse vents as the temperature rises or falls.2. [Automatic Temperature Control Sensor] Automatic temperature control sensor cylinders allow the roof vents to open and close at the appropriate time to ensure adequate airflow.3. [Durable Material] The greenhouse vent opener is made of aluminum and stainless steel, which is durable and weather-resistant for long-term use.4. [Quick Opening and Closing] The automatic vent opener quickly opens and closes the greenhouse window and can be clipped or screwed onto your greenhouse frame.5. [Prevent Overheating] With automatic temperature changes, the ideal growing temperature is maintained and the greenhouse is prevented from overheating.Specification:Item Type: Vent OpenerMaterial: AluminumWindow Bracket Product Size: Approx. 33.5 x 4.5 cm / 13.2 x 1.8 inTemperature Sensing Cylinder Product Size: Approx. 34 cm / 13.4 inWeight: Approx. 436g / 15.4ozOpening Start: 25°C (77°F)Closing Start: 15°C (60°F)Opening Temperature: 38°C / 100°FMaximum Opening Distance: Approx. 45cm/18inSuitable for window or vent weights up to 7kg/15lbApplicable to all and most greenhousesPackage List:1 x Cylinder1 x Window Opener Bracket1 x English Manual8 x Screws4 x Accessories