... in special fastener fiel Name: metal machinery casting part Ability for the material of this kind of hanger: ... ,etcBronzeC51900,C60600,C17200,etcAlumimum100,5052,6061,6063,etcAbility for the surface finish: ElectroplateZinc plated(while,colour,dacroment ... Grinding and polishing,etc,except mirror finish Ability for the tolerance Roundess0.002mmCylindricity0.003mmRoughnessRa0.32Straightness0.01/200mm ...