This U.S. industry comprises establishments primarily engaged in manufacturing table and kitchen articles, art and ornamental items, and similar vitreous china, fine earthenware, stoneware, coarse earthenware, and pottery products. Manufacturing vitreous china plumbing fixtures--are classified in U.S. Industry 327111, Vitreous China Plumbing Fixture and China and Earthenware Bathroom Accessories Manufacturing; Manufacturing porcelain and ceramic electrical products, such as insulators,--are classified in U.S. Industry 327113, Porcelain Electrical Supply 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.