Heaveant Greenhouse Window Opener Kit, Aluminum Alloy Automatic Window Vent Opener Greenhouse Automatic Ventilation Tools Garden Tools

【Auto open and close】When temperature changes automatically, it can automatically open and close to prevent the greenhouse from overheating. 【Wind protection】With springs and support rods, to provide extra protection against wind damage. 【Excellent quality】Greenhouse window opener kit, adopts aluminum alloy material, with good durability and stability. 【Easy to install】It can be directly clamped or screwed on your greenhouse frame, easy to install and use.