Fax machine/scanner/forms printer/paper crusher/mobile phone/wireless phone Material: SUS300、aluminium、copper、SUM24L、S45C SUS420J2SUS300 Outer diameter tolerance: 0.001mm Round tolerance: 0.0003mm Surface roughness tolerance: Ry0.4 Coaxial tolerance: 0.02mm Surface treatment: Non-electrolytic nickel plate