Multi-stage dump truck telescopic hydraulic cylinderTelescopic multi-stage hydraulic cylindersLong stroke hydraulic cylinderAs as experienced Hydraulic Cylinder Manufacturer/ Supplier,Website:http://www.thshydraulic.com, Betten hydraulic manufacturing Hydraulic products include Engineering Hydraulic cylinder(excavator/forklift/crane/tractor cyliner), pneumatic cylinder, hydraulic systemMulti stage hydraulic cylinder has a long stroke, it can also has a big lifting force. The stages could be chosen.The multi stage hydraulic cylinder could be single acting or double acting. Piston rod material is chrome plated 45# steel or 40Gr. Tube Material is steel 20# - 45#. Surface treatment can be made as per customer's request.