... like metallographic analysis. 4>After FQC,we pack goods carefully. Shaft DetailsMaterial:carbon steel,stainless steel,copper, beryllium copper, brass, bronze, OFHC, free-cutting ... ± 0.01mm Ra : 0.8mm I.D. 0.25mm Shaft---carbon Steel shaft,stainless steel shaft,steel shaft Basic process:1.the shafts are made by customized design ...