Hydraulic cylinders of the type series CNL are desi- gned as a pure bolted construction. Cylinder heads and base consist of St 52–3. For the cylinder tubes, “seamless precision steel tubes”, in accordance with DIN 2391, are used and a high-strength steel is used for the milled, polished and hard-chromium-plated piston rods. The piston and piston rod are sealed with compact seals. According to service conditions, the cylinder can be equipped completely with FKM seals.