19 Ceramic shapes, namely, ceramic fiber boards and engineered shapes for use in the glass and ceramic industries for tank lining, tunnel kiln cars, bending furnaces, seals and gaskets; refractory shapes and forms made primarily of ceramic fiber boards for use as linings for ceramic kilns, vacuum furnaces, heat treating furnaces, aluminizing furnaces, back-up insulation for castables, plastics, brick and other refractories, baffle plates in furnaces and kilns, launder and trough linings for nonferrous molten metals, molten metal splash protectant; tank lining, tunnel kiln cars, bending furnaces, seals and gaskets in the glass and ceramics industries; refractory shapes and forms made primarily of ceramic fiber blankets and ceramic fiber papers for use in furnace kilns, refomer and boiler linings, laboratory ovens, oven linings, furnace door linings and seals, furnace repairs, annealing furance linings, reheat furnace linings, investment casting mold wrap, strees relieving blankets, reusable steam and gas turbine insulation, soaking pit seals, expansion joint packing high temperature gasketing, fire protection, process furance liners, acoustical service, cryogenic insulation; in the automotive industry, muffler to manifold heat sheilds, sound absorption in catalytic converters and mufflers and shields; in the aviation industry, for oxygen generating insulation cups