... end core with nickel plated;End core with nickle plated;12L14 end core2,For the similar end core,what ... can we do ?(1), Ability for the material of ... this kind of end core : Grade3.6,4.6 ... polishing,etc,except mirror finish (3),Ability for the tolerance Roundess0.002mmCylindricity0.003mmRoughnessRa0.32Straightness0.01/ ...