Automatic Window Opener Solar Heat Sensitive Auto Vent Opener Maintains Temp

Description

Technical Specifications:
Material: Aluminum + Stainless Steel
Minimum Opening Temperature: 15-25℃
Fully Open Temperature: 38°C / 100°F
Maximum Opening Distance: 45cm / 18''
Maximum Load: 7-15kgs / 15-33lbs
Product Sze: 38 x 9.5 x 9.5 cm / 14.96 x 3.74 x 3.74 inch
Features and Benefits:
?The automatic vent opening device automatically controls the temperature in the greenhouse.
?As the air inside the greenhouse warms, the vents are gradually opened to allow the correct amount of air to flow into the greenhouse, and closed when the optimal temperature is reached.
?The ventilating arm is designed with natural wax, which expands to push the piston, thereby raising the window, because the air warms up, then shrinks when it cools, and is closed with a spring.
?The automatic vent opener can operate without electricity.
Package Contents:
2 x Automatic Vent Opener
Notice:
1. Please allow 1-3cm error due to manual measurement.Pls make sure you do not mind before you bid.
2. The color may have different as the difference display,pls understand.