Important Notice: 1. Automatic ventilation of greenhouse cannot be used at temperatures above 50°C (122°F). 2. Ensure your greenhouse window opens properly. Specifications: Maximum window opening height approximately 45cm. Temperature for full opening around 30°C (varies based on adjustment and load). Maximum weight capacity not exceeding 7kg (15lb). 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 assembly. Color: Black & Silver Material: Aluminum alloy Package Contents: 1 x Automatic Window Opener Kit Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3cm.