Important Notice: 1. The automatic ventilation system for greenhouses 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 45 cm - Full opening temperature: around 30°C (varies based on adjustment and load) - Maximum supported weight: 7 kg (15 lbs) - 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: Lighting effects and differences in display screens may cause slight variations in the color of the item as shown in the picture. Measurement error allowance: +/- 1–3 cm.