1.Material: Steel 2.Pump Shaft P02 3.Diameter: 19; Length: 135mm 4.Excellent Qaulity and service Specification:1. Roundness: 0.0022. Roughness: Ra0.13. Straightness: 0.014. Hardness: HRC45-50Factors: Diameter Tolerance:+0/-0.005Material:carbon steel, stainless steel Apply toWater Pump,Oil Pump and etc.5. Heat treatment: point hardening; quenching hardening.6. Surface treatment: nickel plating, ...