13.2 Solar Heat Sensitive Automatic Greenhouse Window Opener - Aluminum Vent Opener with Double Spring No Power Needed 15lbs Capacity (33.5cm)

- 【Automatic Temperature Control】 Solar heat sensitive vent opener activates at 77°F (25°C) and closes at 60°F (15°C), fully opening at 100°F (38°C) for optimal greenhouse airflow without electricity or batteries - 【Durable Aluminum Build】 Heavy-duty double spring and aluminum alloy construction supports windows up to 15lbs (7kg), with corrosion-resistant brackets for long-term use - 【Easy Installation】 Includes 1 vent opener, 1 bracket, 8 screws, and 4 accessories with English manual for quick setup in greenhouses or sheds - 【Ideal Ventilation】 Maintains stable greenhouse temperature by automatically adjusting window openings up to 18" (45cm), preventing overheating - 【Purchase note】Please pay attention to the product specifications before purchasing to avoid purchasing the wrong product