Important Notice: 1. The automatic ventilation for greenhouse cannot be used at temperatures above 50°C (122°F). 2. Ensure your greenhouse window opens properly before installation. Specifications: - Maximum height of window opening: approximately 45 cm - Temperature for full opening: around 30°C (varies based on adjustment and load) - Maximum weight capacity: not more than 7 kg (15 lb) - Opening temperature range: adjustable between 16°C to 25°C Note: When receiving this item during summer, place the black rod in a refrigerator for at least 5 minutes to allow the cylinder to fully retract before assembling the product. Color: Black & Silver Material: Aluminum alloy Package Contents: 1 x Automatic Window Opener Kit Note: The package includes only the items listed above. Other products are not included. Due to light reflection and differences in display screens, the color of the item in the image may vary slightly from the actual product. Measurement allows an error of +/- 1–3 cm.