Hydraulic Oil Cylinder is used for Bulldozer, Excavator, Cummins Engine parts.Tongtian Oil Cylinder has Good quality, nice price Material of oil cylinder: stainless steelApplication of ... , ground & polished piston rodSeries of oil cylinder:Bulldozer parts series: SHANTUI, KOMATSU, CAT, XCMC, ZOOMLION, HBXGExcavator parts series: KOMATSU, HITACHI, DAEWOO, HYUNDAI, KATO ...