Yziixi Greenhouse Automatic Window Opener Auto Greenhouse Acessories with Solar Power Sensor Vent Roof Opener Replacement Cylinder Temperature Control Lifts 7kg/15Lbs (Double Springs Opener)

• DOUBLE SPRING -- Dual Spring Solar Vent Opener with Stronger Force, up to 15lbs. If 1 Set is still not enough for your window, you could use two window openers together. PREMIUM QUALITY -- The window opener is made of high quality aluminum alloy. Durable and rust resistant in damp environments Long service life. EASY TO INSTALL-- Easy to fit onto your Greenhouse vent or window using supplied screws and clamps or your own fasteners into pre-punched holes. If you have any questions, please don't hesitate to contact with us. NO ELECTRICITY NEEDED -- Uses solar energy, open or close the greenhouse vents as temperature rises or drops and clamps to greenhouse bars. SUITABLE FOR MOST GREENHOUSES -- This opener will automatically open and shut your greenhouse window to maintain the best growing temperature and preventing your greenhouse from overheating.