... steel ,carbon steel,copper and so on4.surface treatment of Anda Fasteners:Passivation,Chromium-Plating,Black, Zinc-Plating ... on your drawing or samples6.packing of our Fasteners:General Export Packing poly bag cartons or according require.7.size of Anda Fasteners:based on ... drawing or we design a new drawing8.delivery of our Fasteners:according ...