1Pc Temperature Sensitive Automatic Window Cylinder Automatic Greenhouse Window Cylinder

[practicality ]This is a replacement cylinder for automatic window opener
[excellent performance ]High sensitive, automatic respond to weather changes, so you don't need to stay near the greenhouse
[how it works ]Non electric, uses solar energy, open or close the greenhouse vents as temperature rises or
[applicablity ]Great for most greenhouse to open or close window automatically
[high quality]Time and labor saving, also can supply a better temperature condition of plant's growth

size: 33.5cm
Material: galvanized sheet aluminum
colour: black

Package Contents:
1 x window opener

Only the above package content, other products are not included.
Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.