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Alloy Reinforced Anti Deformation Greenhouse Automatic Window Opener. Power-Free Automatic Operation: Realizes constant temperature growth without batteries or electricity. Temperature Sensing Adjustment: Accurately senses temperature changes to automatically adjust window opening. Alloy-Reinforced Design: Anti-deformation structure ensures durability and stability. 5-Year Warranty Coverage: Comprehensive protection for all mechanical defects. Multiple Color Options: Available in Silver, Black, Blue, Yellow, and Red. Flexible Customization: Offers full, minor, and sample-based customization options. Rapid Lead Time: Within 15 workdays for both peak and off-peak seasons. Low MOQ: Minimum Order Quantity starts at just 1 piece.