Important notice: 1. Automatic greenhouse ventilation cannot be used at temperatures above 50 °C (122 °F) 2. Make sure your greenhouse window opens normally Specifications: Maximum window opening height approx. 45 cm Temperature at full opening approx. 30 °C (depending on setting and load) Maximum weight not exceeding 7 kg/15 lb, opening temperature regulated between 16 and 25 °C. Note: When you receive this item in summer, you must place the black rod in the refrigerator for at least 5 minutes for the cylinder to fully retract before assembling the product. Color: Black and silver Material: Aluminum alloy Package contents: 1 x automatic window opener kit Only the above content is included in the package, other products are not included. Note: Light reflections and different screens may cause the color of the product in the image to differ slightly from the actual product. The allowed measurement error is +/- 1–3 cm.