Yziixi Solar Heat Sensitive Automatic Greenhouse Vent Opener Auto Vent Kit Gardening Tools for Greenhouses Roof Ventilation (Single Spring Vent Opener)

【AUTOMATIC】This opener will automatically open and close 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 and clamps to greenhouse bars – no drilling needed quality construction.
【APPLICATION】Maximum window opening approximately 45cm/18”, depending on adjustment and load. Window roof vent opener Suitable for greenhouse window up to 7kg (if more than 7kg, we recommend you to use two window opener).
【EASY TO INSTALL】Easy to fit onto your Greenhouse vent or window using supplied screws and clamps or your own fasteners into pre-punched holes., If you have any questions, please don’t hesitate to contact with us.
【WARM TIPS】 Do not use this opener anywhere the temperature will exceed 50° (122F). GUARANTEE: We promise to provide 100% refund or new replacement for you if you received defective product.