... Straightness 0.3-1.0/1000 UsageApplicable to hydraulic pressure, pneumatic cylinder,oil pump barrel, motor body, transmission shaft ... .05270.0890.140.23Packing optional Test Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yieldstrength, Elongation), Technical Properties ... , Impact Test etc), Exterior Size InspectionSKYPE: samsonhuang22 hydraulic cylinder tube st52 din2391