| SIC | Description
|
| 321 | Flat Glass |
3211 | Flat glass |
322 | Glass and Glassware, Pressed or Blown |
3221 | Glass containers |
3229 | Pressed and blown glass, nec |
323 | Products of Purchased Glass |
3231 | Products of purchased glass |
324 | Cement, Hydraulic |
3241 | Cement, hydraulic |
325 | Structural Clay Products |
3251 | Brick and structural clay tile |
3253 | Ceramic wall and floor tile |
3255 | Clay refractories |
3259 | Structural clay products, nec |
326 | Pottery and Related Products |
3261 | Vitreous plumbing fixtures |
3262 | Vitreous china table & kitchenware |
3263 | Semivitreous table & kitchenware |
3264 | Porcelain electrical supplies |
3269 | Pottery products, nec |
327 | Concrete, Gypsum, and Plaster Products |
3271 | Concrete block and brick |
3272 | Concrete products, nec |
3273 | Ready-mixed concrete |
3274 | Lime |
3275 | Gypsum products |
328 | Cut Stone and Stone Products |
3281 | Cut stone and stone products |
329 | Misc. Nonmetallic Mineral Products |
3291 | Abrasive products |
3292 | Asbestos products |
3295 | Minerals, ground or treated |
3296 | Mineral wool |
3297 | Nonclay refractories |
3299 | Nonmetallic mineral products, nec |