High Precision Engine Part 1.Material:Brass copper 2.Tolerance:0.01mm 3.Certification: ... meet individual requirment ,the enginer will give the best process for cost saving and time.(7) Different kinds of finish available ... , PEEK 1000, ESD225, ESD420 , ESD520HRCeramicZrO2, ESD CeramicCarbideCD 650 High Precision Engine Part