Suitable for all greenhouses, including fastening material. The opening angle is easy to adjust. Temperature controlled device. Do not use this opener cylinder in locations where the temperature exceeds 50 degrees Celsius (122°F). Easy and hassle-free installation. The opener can be installed quickly and securely in standard greenhouses. Solar-powered window opener. As the temperature rises or falls, the greenhouse window opens or closes automatically. Automatic window opener for roof vents, compatible with 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) 37.5 cm x 9.5 cm x 5.5 cm Weight: 650 g Color: silver Material: stainless steel Package Contents: 1 x Window Opener Note: Other items not included. Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowed is +/- 1-3 cm.