Vertical Roller Mill Cylinder Bore420/Rod210xStroke460 Working Pressure:250bar Tube Material:CK45 End Cap c/w Rear Clevis material 27SiMn single forging piece Rod Material: 42CrMo4 single forging piece Rod Coating: Chrome plating thickness 50microns Seals Brand: Hallite Bearing Brand: LYC All screw bolts are grade 12.9