Features: Premium Construction: Reliable, premium quality aluminum and iron automatic window opener for greenhouses, durable for long time use. Automatic Opening and Closing of the Window: The greenhouse window opener can be temperature controlled to open and close automatically. Keep your greenhouse at a appropriate temperature. Greenhouse Aid: The automatic greenhouse window opener opens and closes automatically by thermal temperature induction. Keep the plants at the optimal growth temperature. Easy to Use: Window openers are quick and easy to install for the windows of standard garden and greenhouses. Perfect accessories for greenhouse. Customer Service: If you have any questions about this product, please contact us in time, we will provide you with dedicated service. Notice: Actual color may be slightly different from the image due to different display and light effect. Please allow 1-3cm deviation due to manual measurement. Specifications: Material:Aluminum, Iron Fit: for Greenhouse 1 Set * Automatic Window Opener