metal building materials, namely, metal tubes, metal pipes, metal sheets and metal bars and formed pieces of metal of regular and irregular cross-sectional shape for water supply systems and water disposal systems; formed pieces of metal of regular and irregular cross-sectional shape for use in fabricating post and railing structures and enclosures; formed pieces of metal of regular and irregular cross-sectional shape for use in fabricating windows, doors, roller shutters and blinds, skylights, decorative trim, hardware, namely, clips, fasteners, anchors, spacers all for use in fabricating of the formed metal into finished articles

plastic in the form of sheets, plates, and bars for general construction or industrial use; plastic roofing insulation; plastic tubes and pipes for water supply systems and water disposal systems; formed pieces of plastic of regular and irregular cross-sectional shape for use in fabricating windows, doors, roller shutters and blinds, skylights, plastic boxes for enclosing rolled-up roller blinds, post and railing structures and enclosures

skylights of plastic or wood, non-metal plastic post and railings for fences, and non-metal plastic roofing

sheets of plastic or rubber for covering walls and floor, linoleum; rubber mats; carpeting; and anti-static floor coverings for non-safety use