... Countersunk, Segment and more, trapezoid, irregular shape, customized shapes are available5. Max. Size shape: Length or Outer diameter 220mm6. Coating ... :Ni, Zn, NiCuNi, gold, copper, epoxy, chemical, parylene, Everlube, passivation ,tin ... Quality control center and professional machine technicians, which can help to control well in quality, tolerance, ...