6X164 3 STAGE TELESCOPING HYDRAULIC CYLINDER New, HYCO three stage telescoping cylinder. Single acting with work port on rod end. Cartridge valve cavity for a pilot operated relief valve on rod end. Cartridge valve is not included and would require an Integrated Hydraulics cartridge valve number 1CE30F35S5 to be installed in the cavity number AXP6610. Cavity could also be plugged and not used if pilot valve is not required. Two SAE 6 ports for work and pilot connections.