Suitable for all greenhouses, including mounting materials. The opening angle is easy to adjust. Temperature-controlled unit. Do not use this opener cylinder where the temperature exceeds 50 degrees (122F). Easy and hassle-free to install. The opener can be easily installed without problems in standard greenhouses. Window opener uses solar energy. When the temperature rises or falls, the greenhouse opening opens or closes. Automatic window opener for roof vent, suitable for wooden or aluminum greenhouses, no electricity. The cylinder's piston moves depending on the temperature and automatically opens or closes the window. The opening angle is easy to adjust. Technical data Lifting capacity: max. 14 kg Lifting height: max. 45 cm Temperature range: 16 Celsius to 35 Celsius 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 * Window opener Only the above package content, other products are not included. Note: Light photography and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement error is +/- 1-3 cm.