Collect Light Automatic Window Opener Piston For Greenhouse Vent Opener Lift Automatic Window Cold Frame Cylinder Replacement Piston Features: Highly sensitive,automatic response to weather changes,so you don't have to stay near the greenhouse. Uses solar energy,running without batteries or electricityt,opens or closes the greenhouse openings when the temperature rises or falls. Will work with many types of vent opener. Temperature range of approx 15~25°C,Lifting height max 40cm,Lifting capacity max 7kg. If you have any questions with our , please feel to contact us, we will make sure to resolve all your concerns within 48 business hours. Product Description: Collect Light Automatic Window Opener Piston For Greenhouse Vent Opener Lift Automatic Window Cold Frame Cylinder Replacement Piston Material: metal Color: as the picture shows, (Due to the difference between different monitors, the picture may have slight color difference. please make sure you do not mind before ordering, Thank you!) Package weight: 150g Package size: 35x5x4cm,(Please allow 1-3mm error due to manual measurement. please make sure you do not mind before ordering.) Kitchen Faucets Faucet Tools Herramientas Tool Set Hand Tools Kitchen Faucets Faucet Tools Herramientas Tool Set