Gardening Tools descriptions We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Automatic Window Opener For Greenhouse. Features: Prevent Greenhouse Overheating. Ideal for Your Greenhouse Window--opens and Closes Your Greenhouse Window. As the Temperature Changes Automatically, Maintains the Best Growing Temperature and Prevents Your Greenhouse from Overheating. Non Electric, Uses Solar Energy, Open or Close the Greenhouse Vents As Temperature Rises or Drops. Can Be Clamped Onto or Screwed Onto Your Greenhouse Frame. Specifications: Maximum Window Opening: 45cm Maximum Opening About: 30 ° Depending on Adjustment and Load Maximum Opening Weight: 7kg/15lb Adjustable Open Temperature Range: 15 °- 25 °/60 °-77F Size: 38 X 9.5 X 9.5 Cm / 14.96 X 3.74 X 3.74 Inch (appr.) Package Included: 1 X Automatic Window Opener Kit or 1 X Replacement Rod Pole Stick Agriculture: Greenhouse Window Opener Greenhouse: Window Opener Agriculture Tools: Automatic Window Opener Type: Solar Agricultural Greenhouses . Products number : SOMONO87646