... Cylinder Piston Rod ground,hard chrome plated,tempered Grade: CK45/S45/SAE1045,SCM440/SAE4140 Hard Chrome Plated Bar/Hydraulic Cylinder Piston Rod ... Supply Condition:Ground and chrome plated,temperedGrade: CK45/S45/SAE1045,SCM440/SAE4140,EN8D,ST 52,16Mn, ...