1.stainless steel square hinge 2.finish:Hot Dip Galvanized,Stainless Steel 3.All ... complex precision tooling ourselves, and process all kinds of precision metal parts as required. Good quality, professional teamwork, prompts communication service ... plating; 3) Surface treatment: kinds of plating (Zinc, Nikel, Chrome, Tin, Ag); Painting, Powder, Anodizing, E-coating, Silkscreen, Heat treatment, Black ...