14kg automatic window opener for greenhouse ventilation system Suitable for all greenhouses, including fastening material. The opening angle is easy to adjust.<br> Temperature controlled device, Do not use this opener cylinder anywhere the temperature exceeds 50 degree (122F).<br> Easy and hassle-free to install. the opener can be installed easily and without any problems in standard greenhouses.<br> Window Opener Use Solar. When the temperature rises or falls, the opening of the greenhouse opens or closes.<br> Automatic window opener roof vent, suitable for wood or aluminum greenhouses, no electricity, the piston of the cylinder moves depending on the temperature and opens or closes the window automatically. The opening angle is easy to adjust.<br> 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<br> Colour:silver<br> Material:Stainless steel<br> Package Contents:<br> 1 * Window Opener<br> Only the above package content, other products are not included.<br> Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.