Suitable for all greenhouses, including fastening material. The opening angle is easy to adjust. Temperature controlled device. Do not use this opener cylinder in areas where the temperature exceeds 50 degrees Celsius (122°F). Easy and hassle-free to install. The opener can be installed easily and without any issues in standard greenhouses. Window opener operates using solar heat. As the temperature rises or falls, the greenhouse window opens or closes automatically. Automatic window opener for roof vents, suitable for wood or aluminum greenhouses. No electricity required. The piston inside the cylinder moves in response to temperature changes, automatically opening or closing the window. The opening angle is adjustable. Technical data: Lifting capacity: max. 14 kg Lifting height: max. 45 cm Temperature range: 16°C to 35°C Dimensions: (L x W x H) 37.50 cm x 9.5 cm x 5.5 cm Weight: 650 g Color: silver Material: stainless steel Package Contents: 1 x Window Opener Note: Light and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.