J. Orbesen Teknik ApS offer 2 kinds of cylinders to customers. We have a kategori named Standard cylinder, which is for our Standard window openers, Medium window openers and Maxi window opener. Additionally we got special hydraulic cylinders. These special hydraulic cylinders belongs to a group of products we call Thermact. Basically the product group called Thermact is any special configuration of the hydraulic cylinder from our small range window openers.