Brake drum Precision: within 0.01mm Precision casting and CNC machining Certification: ISO9001:2000 OEM/ODM services Brake drumMaterial capability: cast iron, ... are applied in the work shop.·Products are mainly sold to Japan, Germany, USA, Canada, Sweden, Russia and Singapore ETC ... samples, drawings or description.Your enquiries are fully appreciated. Brake drum(precision casting and machining)