Solar Sensitive Automatic Greenhouse Window Opener Vent Replacement Pole good

<p>Description This is a auto window opener, selected premium material, wear resistant lightweight and so portable, safe and durable. It&#39;s made with excellent workmanship. It is suitable for greenhouse usage. A nice helper for you. Features -Color:Black-Material:Stainless steel-Size:34.00X1.50X1.50cm/13.36X0.59X0.59in-This is a replacement cylinder for automatic window opener.-High sensitive, automatic respond to weather changes, so you don&#39;t need to stay near the greenhouse.-Non electric, uses solar energy, open or close the greenhouse vents as temperature rises or drops.-Great for most greenhouse to open or close window automatically.-Time and labor saving, also can supply a better temperature condition of plant&#39;s growth.Packing list: 1 x Automatic Window Opener </p>