... requirement. 5). Surface coating: zinc, silver, copper, black oxide, etc. 6). We can offer test report ... high precision metal shielding cover, high precision metal spring clip, high precision metal sheet, high precision slider and ... , Powder, Anodizing, E-coating, Silkscreen, Heat treatment, Black oxid.EngineerExperienced technicians and professional engineersProcessProgression die, Deep drawing, ...