【Automatical Adjustment】The automatically adjusted temperature is 15 to 25°C. When the temperature exceeds 25 degrees, the window regulator will remain open. As the temperature changes automatically,the greenhouse vent opener cylinder can maintains the best growing temperature and prevents your greenhouse from overheating.
【Nice Replacement】This is a replacement cylinder for automatic window opener. It is ideal for your greenhouse window--opens and closes your greenhouse window.
【Great Quality Durable Material】This greenhouse vent opener cylinder is made of quality material, durable, solid and convenient to use.
【Non-electric】The greenhouse vent opener cylinder uses solar energy, open or close the greenhouse vents as temperature rises or drops.
【Notification】In order to ensure a good use experience,this cylinder needs to be refrigerated before use it.Do not use this opener cylinder anywhere the temperature will exceed 50° (122F).