Automatic Vent Opener Standard Automatic Roof Vent Opener Solar Heat Sensitive Greenhouse Vent Opener Standard-Lifts 30lb for Hothouse Cold Frame Gardening Tools No Power Needed

Product description:
Greenhouse Window Opener Kit
Size:Double spring
Package:
1*Window Vent Opener
1*Poles
1*Buckle
4*Screw
1*Package Box
Non electric, uses solar energy, open or close the greenhouse vents as temperature rises or drops.This product is only suitable for windows installed in greenhouses.
Specification:Double spring.
Material: Aluminum Alloy,Color: Silver
Fully adjustable between 20 – 25 ° C (68 – 77 ° F)
Maximum window opening: 45cm / 18 inch
Maximum opening weight: 15kg/30lb
Size: 38 x 9.5 x 9.5 cm / 14.96 x 3.74 x 3.74 inch (appr.)
NOTE:
Do not use this opener anywhere the temperature will exceed 50° (122F) Please ensure your greenhouse window can be opened freely by at least 45cm (18″)
Do not apply excessive loads by locking or covering window
Do not dismantle the cylinder.
If you have any questions about use, please contact us and we will answer you within 24 hours.

Suitable for Most Greenhouses:The automatic window opener is suitable for greenhouse planting.This product is only suitable for windows installed in greenhouses.The maximum load-bearing capacity of the glass of the ventilation window does not exceed 30lb
Working ConditionThe maximum height of the open window is about 45 cm (18 inches)
Easy To Install:Uses Solar energy only, no power required.
Excellent Quality:Stainless steel galvanized sheet, double spring design, automatic temperature adjustment 15-25°
Tips：Note: Do not apply excessive loads by locking or covering window.The automatic ventilation window opener in the greenhouse cannot be used in an environment with a temperature higher than 50°