... stamping part with black oxide coating;Carbon steel stamping part;Stamping part with balck oxide coating 2,For the similar stamping ... copper plated,gold plated,chrome(3+Rohs &6+ ) plated,anodic oxidation,etc Dip plating black oxide coating,hot dip galvanizing, ... etc Flame plating Light oil,spray coating,electrophoretic coating,etc Polishing Grinding ...