This industry comprises establishments primarily engaged in shaping, molding, glazing, and firing pottery, ceramics, and plumbing fixtures made entirely or partly of clay or other ceramic materials. Cross-References. Establishments primarily engaged in-- ? Manufacturing ferrite microwave devices and electronic components--are classified in Subsector 334, Computer and Electronic Product Manufacturing; ? Manufacturing enameled iron and steel plumbing fixtures--are classified in Industry 33299, All Other Fabricated Metal Product Manufacturing; ? Manufacturing metal bathroom accessories--are classified in Subsector 332, Fabricated Metal Product Manufacturing; ? Manufacturing plastic bathroom accessories, cultured marble, and other plastic plumbing fixtures--are classified in Industry 32619, Other Plastics Product Manufacturing; and ? Manufacturing clay building materials, such as ceramic tile, bricks, and clay roofing tiles, and refractories--are classified in Industry 32712, Clay Building Material and Refractories Manufacturing.