Metal building materials and elements, namely, post caps; unprocessed and partially processed metal materials not adapted for a specific use, namely, common metals, unwrought or semi-wrought; small ironwares, namely, metal nuts, metal bolts, metal screws, metal nails; small ironwares for buildings, namely, metal nuts, metal bolts, metal screws, metal nails; metal doors, gates, windows and window coverings being shutters; structures and transportable structures of metal, namely transportable b...