... or seam welding, spinning, metal assembly are available.(3) Surface finish : coating-plating, Zinc plating, enamel, hot-dip, and polishing and so ... 5 mm4. Electroplating: Nickel (Zinc, Chrome, Silver, Gold, etc.)5. Finish: No Burrs and Sharp Edges6. Visual: Bright7. Tolerance: ±0.02mm ...