Hard Anodizing Line for Watch & Small Precision Parts | 6–10μm Nickel-Free Optional This precision hard anodizing line is specially engineered for miniature aluminum components, including watch cases, watch bezels and small electronic precision parts. It delivers ultra-stable 6–10μm uniform hard oxide film for high-end decorative and protective surface treatment. The line supports dual surface pre-treatment: fine sandblasting and mirror polishing. Combined with electrolytic