High Precision Engine Part 1.Material:Brass copper 2.Tolerance:0.01mm 3. ... kinds of finish available ,like amodized,power , coadting,palting.Other specification: STOCK OF COMMONLY USED MATERIALAustenitic Steel SUS303, SUS304 Cold Work ... , PEEK 1000, ESD225, ESD420 , ESD520HRCeramicZrO2, ESD CeramicCarbideCD 650 High Precision Engine Part