Features: 1. Greenhouse window opener ideal for your greenhouse window - opens and closes your greenhouse window 2. Vent opener, as the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating. 3. Greenhouse Vent Opener Non Electric, Uses Solar Energy, Opens or Closes Greenhouse Vents When Temperature Rises or falls 4. Can be clamped to your greenhouse frame or screwed into place. 5. Make sure your greenhouse window can be opened at least 45 cm wide. Specifications: Greenhouse Window Opener Kit Maximum window opening 45 cm Maximum opening approx. 30° depending on setting and load Maximum opening weight 7 kg Adjustable open temperature range 15 ° - 25 ° / 60 ° -77F Package: 1 # Automatic Window Opener Kit / Replacement Greenhouse Window Opener Cylinder (You can choose what you want) Notes: Do not use this opener in places where the temperature exceeds 50°. Please ensure that your greenhouse window can be opened at least 45 cm (18 inches). Do not apply excessive loads by locking or covering the window. Do not disassemble the cylinder. The opener cannot be stopped manually. Monitors are not calibrated the same. The object colour shown in the photos may differ slightly from the actual object. Please take the real one as standard. 1. Greenhouse Window Opener - Ideal for your greenhouse window - opens and closes your greenhouse window. 2. Air vent opener, as the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating. 3. Greenhouse vent opener, not electric, uses solar energy, opens or closes greenhouse vents when temperature rises or falls. 4. Can be clamped or screwed to your greenhouse frame. 5. Make sure your greenhouse window can be opened at least 45 cm wide.