... T20, 3M, 5M, 8M. Surface treatment: High frequency, black of oxidation, zincing, nickelage, anode. Machine: CNC engine lathe, milling ... certification: ISO9001:2008.Order requirement: materialkindly offer us what kinds of material you want.sizecustomize size is welcomed.craftswe ... air transportation or as requiredProfessional manufacturer and exporter of CNC machine parts in high precison according to ...