This is a replacement cylinder for automatic window opener.

Highly sensitive, automatic response to weather changes, so you don't have to stay near the greenhouse.

Non-electric, uses solar energy, opens or closes greenhouse vents as temperature rises or falls.

Automatic greenhouse roof window opener is perfect for most greenhouses to open or close windows automatically.

Time and labor saving, can also provide better temperature conditions for plant growth.

Specifications:

Condition: 100% new

Temperature range: 20~25 / 68~77

Size: approx. 33 * 1.5 cm / 12.99 * 0.59 inches

Color: black + silver

Material: stainless steel + plastic

Package contents:

2 * Window opener

Only the above package content, other products are not included.

Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3 cm.