... metallographic analysis. 4>After FQC,we pack goods carefully. Shaft DetailsMaterial:carbon steel,stainless steel,copper, beryllium copper, brass, ... 0.8mm I.D. 0.25mm Shaft---drive shaft,carbon steel shaft,micro drive shaft Basic process:1.the shafts are made ... .prepay 40% before massive production then pay the balance after goods is ready.Or accordingto contract. drive shaft steel shaft precise shaft