Important Notice: 1. The automatic ventilation for greenhouse is not suitable for use at temperatures above 50°C (122°F). 2. Ensure your greenhouse window operates properly before installation. Specifications: - Maximum window opening height: approximately 45cm - Temperature for full opening: around 30°C (varies based on adjustment and load) - Maximum supported weight: 7kg (15lb) - Adjustable opening temperature range: 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 fully retract the cylinder before assembling the product. Color: Black & Silver Material: Aluminum alloy Package Contents: 1 x Automatic Window Opener Kit The package includes only the items listed above; other products are not included. Note: 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 error allowance: +/- 1-3cm.