Materials Steel, Brass, Copper, Stainless steel, Plastic, Aluminium, POM, Delrin, Titanium Alloy etc. Surface treatment Anodizing:color anodizing,hard anodizing Plating: Nickel, chrome, zinc plating,powder coating Polishing: Electrolytic polishing,mirror polishing heat treatment ,sand blasting, Brushing.etc http://www.tuofamachining.com