Garage Door Openers descriptions We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Solar Heat Sensitive, Automatic Thermo Vent-window Opener For Greenhouse. Features: 1. Open the Window According to the Temperature. 2. Easy to Adjust the Open Angle. 3. Made of Aluminum.Easy to Install, Partial Assembly,with Spring and Installation Fittings. 4. Automatic Window Opener is Suitable for All Greenhouse or Furniture Frames. 5. The Window Opener is an Automatic Temperature Control Device. 6. NC Contactor Responds to the Temperature Change Directly,lead the Window Open or Close. 7. Window Opener is Working at the Temperature Range About 13 to 34 . 8. The Cylinder Reacts to Room Temperature Directly. 9. No Batteries or Electricity Required. Specifications: Cylinder L X D: 26 X 1.5 Cm/10.24 X 0.59" Lifting Capacity: Maximum 15 Kg Lifting Height: Maximum 40cm/15.75" Temperature Range: 10 to 37 Open Angle: 30 ° Size: Long X Width X Height: 370 X 50 X 235 Mm/14.57 X 1.97 X 9.25" Weight: 0.6kg Ultimate Load: 15kg Package Include: 1 X Automatic Window Opener . Products number : SOMONO87467