Du-Co Ceramics Company, Saxonburg, PA, has met the requirements to be registered to ISO 9002. The 51 year old company is a manufacturer of ceramics for heat and electrical insulation for the automotive, appliance, lighting and heating industries, and also covers the foundry and electronic industries. Du-Co works in materials such steatite, cordierite, porcelain, alumina, and magnesium oxide. They also manufacture using the dry pressing and extrusion methods and perform secondary machining operations and centerless and length grinding.